Question

3. ... ... 9, 12 are in
proportion​

Answer 1

Answer:

3,x,9,12 are in proportion

That means,

12*3= 9x   ( if a,b,c,d are in proportion ad=bc)

9x=36

x=4

The missing number is 4

Answer 2

Answer:

4,6 is proporation ok so this is answer ok

this is a write answers