Continue the pattern:

6, 9, 13.5, 20.25,

6, 9, 13.5, 20.25,

`_________`

Continue the pattern:

6, 9, 13.5, 20.25,

6, 9, 13.5, 20.25,

`_________`

Detailed Explanation

The pattern is the previous number multiplied by 1.5. Therefore, \(6 \times 1.5 = 9\); \(9 \times 1.5 = 13.5\); \(13.5 \times 1.5 = 20.25\); \(20.25 \times 1.5 = 30.375\)