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Finding the Fourth Proportional to 28,490.73, 42,691.95 and 21,463.17

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Solution

The fourth proportional to 28,490.73, 42,691.95 and 21,463.17 is: 32,161.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.73 : 42,691.95 = 21,463.17 : x
  2. Step 2: Convert to fraction form
    28,490.73/42,691.95 = 21,463.17/x
  3. Step 3: Cross multiply
    28,490.73x = 42,691.95 × 21,463.17
  4. Step 4: Simplify right side
    28,490.73x = 916,304,580.48
  5. Step 5: Solve for x
    x = 916,304,580.48/28,490.73
  6. Step 6: Final answer
    x = 32,161.50

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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.