Posted by **deborah** on Monday, December 3, 2012 at 2:56pm.

Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠.

1.

seven-fifths and fifteen-tenths (

=

≠

2.

six-eighths and fifteen-twentieths

=

≠

Solve each problem.

3.

two-thirds equals twelve over x

x = 18

x = 12

x = 36

x = 8

4.

six-elevenths equals eighty-four over x

x = 40

x = 120

x = 254

x = 154

5.

twenty-two miles over fifty-five hours equals twelve miles over h hours

48

30

45

22

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