Solving Scaling Problems
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Objective
I can use proportional reasoning to solve scaling problems in real-world contexts.
Part 1 of 4
Warm-up video
Math with Mr. J · 8:36Vetted channel
We don't generate video — this one is by Math with Mr. J on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
When solving proportions using relationships, you can use multiplication or division to find the unknown value.
- 2
When using cross multiplication to solve proportions, you must first cross multiply, then set the cross products equal to each other, and then solve.
- 3
When solving proportions using relationships, you can look for a relationship that uses multiplication or division horizontally, from side to side between the ratios.
Part 3 of 4
Practice
12 questions
In the proportion 5/x = 15/45, what is the relationship between 15 and 5? Use this relationship to find the value of x.
Solve the proportion 8/12 = y/3 using the relationship between the denominators.
Part 4 of 4
Exit ticket
Quick comprehension check
“A map has a scale of 1 cm to 50 km If two cities are 3.5 cm apart on the map, what is the actual distance in miles between the two cities?”
Sample answer included in the free materials
Get the materials
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Teacher Guide
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