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Finding the Fourth Proportional to 41.70, 62.51 and 21.39

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Solution

The fourth proportional to 41.70, 62.51 and 21.39 is: 32.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.70 : 62.51 = 21.39 : x
  2. Step 2: Convert to fraction form
    41.70/62.51 = 21.39/x
  3. Step 3: Cross multiply
    41.70x = 62.51 × 21.39
  4. Step 4: Simplify right side
    41.70x = 1,336.98
  5. Step 5: Solve for x
    x = 1,336.98/41.70
  6. Step 6: Final answer
    x = 32.06

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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.