PL Tourney Final Table Hand

[Paul2432]

The following occurred at the final table of a Pokerstars $30 PL tournament. 85 players, 9 remaining, average stack is ~14000. Blinds are 600/1200. I am in the SB with about 9500. BB has about the same. Player about UTG+3 has around 3000, everyone else has 15000+ (largest stack is about 30000).

The prize structure is as follows:

765,510,306,255,204,165,140,114,89

Note that since 9th place is already assured, the effective prize structure is now:

675, 420, 216, 165, 114, 76, 51, 25

So here is what happened. I am dealt A-9 offsuit. Everyone folds to me and I raise to 3600. Big blind re-raises all-in. I call, he has AQ and I lose.

My thinking in calling was that if I fold I will be in "survival" mode and may move up perhaps two places. Most likely just one or maybe none. I figured my equity in the prize pool after folding would be perhaps $50 additional. On the otherhand, if I call and win I would have perhaps $250 in additional prize pool equity. So I would only need a 20% chance of winning the hand to make calling the right play.

My question is, is this right way to look at things at the final table as opposed to simple pot odds? Are my estimates reasonable?

Thanks,
Paul