Whatmust be subtacted from each of the numbers `31,19,13` and `10 `so that they are in proportion

What number must be subtracted from each of the numbers 53, 21, 41, 17 so that the remainders are in proportion?

What number must be substracted from each of the numbers 53,21,41,,17 so that the remainders are in proportion?

What must be subtracted from each of the numbers 23, 40, 57 and 108 so that the remainders are in proportion ?

What least number must be substracted from each of the numbers 14, 17, 34 and 42 so that remainder may be proportional?

What least number must be subtracted from each of the numbers 14, 17, 34 and 42 so that the remainders may be proportional ?

What number must be subtracted from each of the numbers 32, 38, 17 and 20, so that the terms formed will be in proportion ?

What least number must be subtracted from each of the numbers 7 , 17 and 47 so that the remainders are in continued proportion ?

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