Quote Originally Posted by string View Post
Hmmm, This looks suspiciously like math,
Naah, it's only arithmetic. Rest easy. You could turn it into algebra if you absolutely insist, but you need not, really.

especially since I'm more like 36" at my widest point.
So had you rather a 9 inch apron, or 12?

Say 9: that leaves 27" for the pleats, 9 of them. Spread your 10-inch taper across the middle 7 in some proportion that pleases you, and Bob's your uncle.