Question

20. What same number should be added to each one of the numbers 15, 23, 29, 44 to obtain numbers
which are in proportion?
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Answer 1

Answer:

let assume number be x

now according to question

(15+x)÷(23+x)= (29+x)÷(44+x)

by cross multiplication

we get the value of x = 1

so we add 1