Let the amount of consecutive hits needed be h. We have:

hits / at bats = Batting Average

Plugging in our numbers, we get:

(9 + h)/60 = 0.400

Cross multiply:

9 + h = 60 * 0.4

9 + h = 24

To solve this equation for h, we type it in our search engine and we get:

h =

**15**