I already addressed this query in the support ticket you opened, however I will post my reply here as well.
This could be acheived by subscribing the data item's change event and modifying the values accordingly. For example:
//get the value of the first DropdDwnList and use it to update the rest of the fields
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.