Finding the Fourth Proportional to 54.56, 81.84 and 18.00
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Solution
The fourth proportional to 54.56, 81.84 and 18.00 is: 26.99
Step by Step Solution
- Step 1: Write the proportion equation
54.56 : 81.84 = 18.00 : x - Step 2: Convert to fraction form
54.56/81.84 = 18.00/x - Step 3: Cross multiply
54.56x = 81.84 × 18.00 - Step 4: Simplify right side
54.56x = 1,472.81 - Step 5: Solve for x
x = 1,472.81/54.56 - Step 6: Final answer
x = 26.99
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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.