Every 100 seeds of corn he plants, he harvests 84 ears of corn. If he wants to harvest 7200 ears of

Every 100 seeds of corn he plants, he harvests 84 ears of corn. If he wants to harvest 7200 ears of corn, how many seeds must he plant?

Set up a proportion seeds to ears:
100/84 = x/7200 where x is the number of seeds needed for 7200 ears of corn.

Using our proportion calculator, we get:
x = 8,571.43 ~ 8,572