Question

plz tell the answer its urgent​

Answer 1

Answer:

2

Step-by-step explanation:

Let the number added be x.

According to Question,

(5+x) : (8+x) : : (12+x) : (18+x)

=> (5+x) / (8+x) = (12+x) / (18+x)

=> (5+x) (18+x) = (12+x) (8+x)

=> x²+23x+90 = x²+20x+96

=> 23x - 20x = 96-90

=> 3x = 6

=> x = 2

Hence, 2 should be added to each of the numbers to make them proportional.