Question

what no. be added to each of the no.5,9,7,12 to get the no. which are in proportion​

Answer 1

Answer:

just add 3 to each unit

Step-by-step explanation:

5+3=8

9+3=12

7+3=10

12+3=15

now propotion will be:

8:12 :: 10:15

simplify it and u will get 2/3 on either sides.