In a science experiment, the ratio of water to salt is 3:1. If there are 15 grams of salt, how many grams of water are needed? The number of grams of water needed is ______.
Answer & Analysis
Analysis
Question Analysis
This question tests the student's ability to apply proportions to a real-world scenario. The problem involves finding the amount of water needed based on the given ratio and the amount of salt.
Key Concept Explanation
A proportion is an equation stating that two ratios are equal. In this case, the ratio of water to salt is 3:1, which can be written as . The cross-multiplication rule, , is used to solve for the unknown variable.
Step-by-step Solution
1. Set up the proportion:
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