Unit 3 Lesson 2 Day 2-Setting Up Proportions

Warm-Up: IXL

R.16 Form a Proportion

https://www.ixl.com/math/grade-6/do-the-ratios-form-

a-proportion

Setting Up Proportions :

1) What do you need to find?

• Read the problem carefully to identify what piece of information is

missing. This will be represented by a variable in your proportion.

2) What do you know?

• Read the problem carefully again to identify what pieces of

information you have. Amounts and units are important.

3) Write a Proportion.

• Set up a proportion, keeping the units in the same place on both

ratios.

4) Solve.

• Cross multiply and solve for the variable.

5) Check.

• Cross multiply to ensure your answer is correct.

Fill in the Blanks

Kim earned $420 for 30 hours of work last week. If she earns the same hourly rate next week, how much will she earn for 40 hours of work?

Fill in the Blanks

Ben traveled 1,800 miles over three days. If he continues to travel at the same rate, how many miles will he have traveled after 8.5 days?

Fill in the Blanks

A school has a ratio of 10 girls for every 6 boys. If one team of classes has 15 boys, how many girls are there?

Fill in the Blanks

Six cans of soda cost $2.50. How much will 20 cans cost?

EXIT TICKET

#2

Fill in the Blanks

1.   Find the value of x.

$\frac{8}{5}=\frac{4}{X}$

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2.   Find the value of x.

$\frac{6}{x}=\frac{21}{28}$

Fill in the Blanks

3.   Find the value of x.

$\frac{7}{2}=\frac{x}{12}$

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4.   Find the value of x.

$\frac{4}{12}=\frac{6}{x}$

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5.   Find the value of x.

$\frac{15}{x}=\frac{9}{6}$

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6.   Find the value of x.

$\frac{x}{11}=\frac{3}{20}$