JSFiddle - React, Tailwind, and code Playground

HTML

<select id="from1" relatedTo="to1">
    <option value="10">10</option>
    <option value="20">20</option>
    <option value="30">30</option>
    <option value="40">40</option>
</select>

<select id="to1" relatedTo="from1">
    <option value="10">10</option>
    <option value="20">20</option>
    <option value="30">30</option>
    <option value="40">40</option>
</select>

<br/>

<select id="from2" relatedTo="to2">
    <option value="100">100</option>
    <option value="200">200</option>
    <option value="300">300</option>
    <option value="400">400</option>
</select>

<select id="to2" relatedTo="from2">
    <option value="100">100</option>
    <option value="200">200</option>
    <option value="300">300</option>
    <option value="400">400</option>
</select>

JavaScript

// function to validate two selects
function validateSelects( fromSelector, toSelector ) {
    
    // registering the change event to the "to" select
    $( toSelector ).change(function() {
        
        var fromSelector = "#" + $(this).attr( "relatedTo" );
        var toSelector = "#" + $(this).attr( "id" );
        
        // compares the value of the selected item with the from select
        if ( $(this).val() > $( fromSelector ).val() ) {
            
            // selects the value of the from select
            $(this).val( $( fromSelector ).val() );
            
        }
        
    });
    
    // puts the gui in a valid state
    $( fromSelector ).change(function() {
        
        var fromSelector = "#" + $(this).attr( "id" );
        var toSelector = "#" + $(this).attr( "relatedTo" );
        
        // compares if the value of this field is less than the value of the "to" select
        if ( $(this).val() < $( toSelector ).val() ) {
            
            // if so, change the value of the "to" select
            $( toSelector ).val( $(this).val() );
            
        }
        
    });
    
}

validateSelects( "#from1", "#to1" );
validateSelects( "#from2", "#to2" );