Question

)) Complete the ratio table. 3 6 9 12 15 4 8 20​

Answer 1

Can't explain but

9:12

12:16?

Answer 2

Answer: 12, 16

Explanation: find the common difference
Do 8-4=4 which mean the right side of the ratio table goes up by +4.
You can plug it in to prove it if needed! :)