Geometric sequence

Question

9th sequence is 17/9, 12th term is 51, what is the 15th term

Answer 1

a9 = 17/9

a12 = 51

a15= 1377

17/9, 17/3, 17, 51, 153, 459, 1377, ...

each term is 3 times the previous term

It's a geometric sequence with common ratio = 3