Finding the Fourth Proportional to 48.02, 72.03 and 20.99
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Solution
The fourth proportional to 48.02, 72.03 and 20.99 is: 31.48
Step by Step Solution
- Step 1: Write the proportion equation
48.02 : 72.03 = 20.99 : x - Step 2: Convert to fraction form
48.02/72.03 = 20.99/x - Step 3: Cross multiply
48.02x = 72.03 × 20.99 - Step 4: Simplify right side
48.02x = 1,511.55 - Step 5: Solve for x
x = 1,511.55/48.02 - Step 6: Final answer
x = 31.48
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.