JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row equalheight">
    <div class="three columns"> ... </div>
    <div class="three columns"> ... </div>
    <div class="three columns"> ... </div>
    <div class="three columns"> ... </div>
</div>

CSS

div.equalheight {
    display: table;
    width: 100%;
}

div.equalheight .columns {
    display: table-cell;
    border: 1px solid;
}

div.equalheight .columns:first-child {
    height: 20em;
}