so uh i answered the question already but in case it didn't post i will paste my answer here too:
16.9if FG is 20, and RS is 24, and they are both in the same circle and are both (t-shaped ya know like it says--I don't know what to call them), then its a ratio:FG20/OP14 is the same as RS24/x;24*14= 336/20= approximately 16.9
