To determine which number is a solution of the inequality \( b > 11.3 \), we need to check each number:
- 15: \( 15 > 11.3 \) (True)
- 4: \( 4 > 11.3 \) (False)
- –14: \( -14 > 11.3 \) (False)
- 9: \( 9 > 11.3 \) (False)
The only number that satisfies the inequality \( b > 11.3 \) is 15.