What must be added to the number `6, 10 , 14` and `22` so that they are in proportion?

What must be added to the numbers 61014 and 22 so that they are in proportion?

What must be added to the given numbers so that they are in proportion? a. 1, 3, 10, 18 b. 23, 34, 56, 78

What must be added to the numbers 7,16,43 and 79, so that they became proportional?

What number must be added to each of the numbers 6, 15, 20 and 43 to make them proportional ?

What must be added to each of the numbers 3, 7, 8 and 16 so that resulting numbers are in proportion ?

What number should be added to each of the number 6,7,15,17 so that the resulting numbers are in proportion ?