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Finding the Fourth Proportional to 41.52, 62.28 and 21.18

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Solution

The fourth proportional to 41.52, 62.28 and 21.18 is: 31.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.52 : 62.28 = 21.18 : x
  2. Step 2: Convert to fraction form
    41.52/62.28 = 21.18/x
  3. Step 3: Cross multiply
    41.52x = 62.28 × 21.18
  4. Step 4: Simplify right side
    41.52x = 1,319.09
  5. Step 5: Solve for x
    x = 1,319.09/41.52
  6. Step 6: Final answer
    x = 31.77

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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.