Question

4. Which ratios form a proportion? Use cross products to test each pair.
A. 9/17 27/50
B. 12/35 24/75
C. 15/55 33/121
D. 12/35 20/70​

Answer 1

The right answer is Option C.

Step-by-step explanation:

A. 9/17 and 27/50

Using cross product;

$\frac{9}{17}=\frac{27}{50}\\9*50=17*27\\450=459$

The ratio does not form proportion.

B. 12/35 and 24/75

$\frac{12}{35}=\frac{24}{75}\\12*75=24*35\\900=840$

The ratio does not form proportion.

C. 15/55 and  33/121

$\frac{15}{55}=\frac{33}{121}\\15*121=33*55\\1815=1815$

The ratio form a proportion.

D. 12/35 and 20/70​

$\frac{12}{35}=\frac{20}{70}\\12*70=20*35\\840=700$

The ratio does not form proportion.

The right answer is Option C.

Keywords: ratio, proportion

Learn more about proportions at:

• brainly.com/question/3358617
• brainly.com/question/3411756

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