Question

9,12,16 are in continued proportion

Answer 1

so the proportion will be
↘️↘️↘️↘️↘️↘️↘️↘️↘️

9:12: :12:16
reduced form

3:4: :3:4
⬆️⬆️⬆️⬆️⬆️⬆️⬆️⬆️⬆️

hope it helps

☺️☺️☺️☺️☺️☺️

Answer 2

So, we can write as :
9:12::12:16
.
.
.
Hope it'll help u.