PT= 42, VZ= 4
The ratio between these 2 shapes is 1:7 so, whatever is on the left shape, multiply it by 7 to get the length for the right shape and you can reverse it to.
PT:
VW*7 --> 6*7
42
VZ:
ST/7 --> 28/7
4
Hope this helps!
Let me know if you need anything else :)