Finding the Fourth Proportional to 54.57, 81.85 and 13.99
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Solution
The fourth proportional to 54.57, 81.85 and 13.99 is: 20.98
Step by Step Solution
- Step 1: Write the proportion equation
54.57 : 81.85 = 13.99 : x - Step 2: Convert to fraction form
54.57/81.85 = 13.99/x - Step 3: Cross multiply
54.57x = 81.85 × 13.99 - Step 4: Simplify right side
54.57x = 1,144.86 - Step 5: Solve for x
x = 1,144.86/54.57 - Step 6: Final answer
x = 20.98
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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.