tolong jawab ! => 20 : 40 :: x : 20

Hello friend !

Your answer :)

=> 20 : 40 :: x : 20

=> Multiply the extreme term and middle term

=> Extreme term ( 20 × 20 ), middle term ( 40 × x )

=> 40 × x = 20 × 20

=> 40x = 400

=> x = 400/40

=> x = 10

Therefore , the required answer is 10

:-) Hope it helps !