25nl 6M I am really confused by this hand (AK)

[MegalomaniaMan]

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool (http://poker-tools.flopturnriver.com/Hand-Converter.php) from FlopTurnRiver.com (http://www.flopturnriver.com) (Format: FlopTurnRiver)

Button ($24.40)
Hero ($22.60)
BB ($24.40)
UTG ($12.90)
MP ($25)

Preflop: Hero is SB with Khttp://www.flopturnriver.com/phpBB2/images/smiles/spade.gif, Ahttp://www.flopturnriver.com/phpBB2/images/smiles/heart.gif.
[color=#CC3333]UTG raises to $1.25</font>, [color=#666666]2 folds</font>, [color=#CC3333]Hero raises to $4.25</font>, [color=#666666]1 fold</font>, [color=#CC3333]UTG raises to $7.25</font>, Hero calls ?.
should i just shove? and why?
i have no history with villain.

[Genz]

UTG is quite short. If you call, he will be all-in on the flop anyway. If he had a really premium hand, he would have pushed himself after your reraise. So I'd push here before he can see a flop. Against a shortie, your hand is certainly big enough.

BTW: the converter knows a 2+2-format. please use it, it looks nicer.