Question

which pair of ratios forms a proportion? hint: check for cross products. a. 6/9=9/12 b. 8/16=10/21 c. 6/15=10/25 d. 4/14=6/27

Answer 1

Answer:

  c. 6/15 = 10/25

Step-by-step explanation:

Using the hint, we can form the cross products of the offered choices:

a.  6(12) vs 9(9) ⇒ 72 vs 81 . . . not a proportion

b.  8(21) vs 16(10) ⇒ 168 vs 160 . . . not a proportion

c.  6(25) vs 15(10) ⇒ 150 vs 150 . . . IS A PROPORTION

d.  4(27) vs 14(6) ⇒ 108 vs 84 . . . not a proportion

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The cross products are the same for choice C, so that is a pair of ratios that form a proportion:

  6/15 = 10/25