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The problem states that the rice mixture consists of seven parts white rice to three parts wild rice. If Ms. Salazar uses 30 cups of white rice, we are asked to find how many cups of wild rice she will need.

We can set up a proportion based on the given ratio:

\[
\frac{7}{3} = \frac{30}{x}
\]

Where:
- \(7\) is the part of white rice,
- \(3\) is the part of wild rice,
- \(30\) is the cups of white rice,
- \(x\) is the cups of wild rice we need to find.

To solve for \(x\), we cross-multiply:

\[
7x = 3 \times 30
\]

\[
7x = 90
\]

\[
x = \frac{90}{7} \approx 12.86
\]

So, she will need approximately **12.86 cups** of wild rice.

Would you like further clarification on this solution?

Here are some related questions for further practice:
1. If the ratio was 4:1, how many cups of wild rice would be needed for 20 cups of white rice?
2. What is the total amount of rice (white + wild) in Ms. Salazar’s mixture if she uses 30 cups of white rice?
3. If Ms. Salazar wanted to use 15 cups of wild rice, how much white rice would she need?
4. How does the proportion change if the ratio becomes 5 parts white rice to 2 parts wild rice?
5. Can you calculate how many cups of wild rice are needed if she uses 50 cups of white rice?

**Tip**: When working with ratios, always try to set up a proportion to solve for the unknown value efficiently!

Ms. Salazar’s rice mixture consists of seven parts of white rice to three parts of wild rice. If she uses 30 cups of white rice, about how many cups of wild rice will she need?

Learn how to solve a ratio problem involving a rice mixture. Given a ratio of 7 parts white rice to 3 parts wild rice, find out how many cups of wild rice are needed if you have 30 cups of white rice. Detailed explanation using proportion and cross-multiplication. Suitable for students in Grades 5-7.

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