<div class="col-md-8 modal-images">
         <div class="row large-image">
         <div class="col-md-12">
            <img src="One.png">
             </div>
          </div>
          <br/>
          <div class="row small-image">
              <div class="col-md-4">
                  <img src="One.png">
              </div>
              <div class="col-md-4">
                  <img src="Two.jpg">
              </div>
              <div class="col-md-4">
                  <img src="Three.jpg">
              </div>
              <div class="col-md-4">
                  <img src="Four.jpg">
              </div>
          </div>
          </div>

$('.small-image img').closest('.col-md-4').click(function(){
        var newimage = ($('.small-image img').closest('.col-md-4').find('img').attr('src'));
       $('.large-image img').attr('src', newimage);
    });