📝 Practice Worksheets
🛠️ Related Tools
🔑 Key Concepts
- A proportion shows that two ratios or fractions are equal.
- Cross products can help solve proportions with variables.
- Multiply diagonally across the equal sign.
- After cross multiplying, solve the equation for the variable.
- You can sometimes simplify first to make the numbers easier.
💡 Main Idea
To solve a proportion, use cross products to create an equation. Then divide both sides to isolate the variable.
✏️ Worked Examples
🧠 Math Vocabulary
- Proportion: an equation showing that two ratios or fractions are equal.
- Ratio: a comparison of two quantities.
- Cross Products: the products found by multiplying diagonally in a proportion.
- Equivalent Ratios: ratios that have the same value.
- Variable: a letter used to represent an unknown value.
📚 What You Should Already Know
Students should already know how to multiply, divide, simplify fractions, identify equivalent ratios, and solve one-step equations.
🚀 What Comes Next
This lesson prepares students to solve proportion word problems, scale problems, percent problems, and equations involving proportional relationships.
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