Question

find out whether following groups of number are in proportion or not.18,20,9,10​

Answer 1

Answer:

yes they r in proportion

Step-by-step explanation:

18x10=180

20x9=180

Answer 2

Step-by-step explanation:

18:20=9:10

power of extreme=product of means

18:10=20:9

18×10=180

20×9=180

therefore they are in proportion