Question

Which ratios form a proportion?

4/10 and 10/25
3/5 and 9/25
4/11 and 6/13
4/9 and 9/4"

Answer 1

To determine if ratios form a proportion, cross-multiply and compare the cross-products. Only the ratios 4/10 and 10/25 form a proportion.

Step-by-step explanation:

To determine which ratios form a proportion, we need to check if the ratios are equal. Let's check each pair:

• 4/10 and 10/25: To check if these ratios form a proportion, we can cross-multiply. If the cross-products are equal, then the ratios form a proportion. (4 * 25) = (10 * 10). The cross-products are equal, so these ratios form a proportion.
• 3/5 and 9/25: (3 * 25) is not equal to (5 * 9), so these ratios do not form a proportion.
• 4/11 and 6/13: (4 * 13) is not equal to (11 * 6), so these ratios do not form a proportion.
• 4/9 and 9/4: To check if these ratios form a proportion, we can cross-multiply. If the cross-products are equal, then the ratios form a proportion. (4 * 4) is not equal to (9 * 9), so these ratios do not form a proportion.