Question

Show that 15, 20, 30, 40 are in proportion.

Answer 1

Answer:

To show that 15, 20, 30, 40 are in proportion.

15 : 20 : : 30 : 40

product of extremes = product of means

15 × 40 = 20 × 30

600 = 600

hence,15, 20, 30, 40 are in proportion.