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Finding the Fourth Proportional to 21,488.92, 29,654.80 and 12,057.52

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Solution

The fourth proportional to 21,488.92, 29,654.80 and 12,057.52 is: 16,639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.92 : 29,654.80 = 12,057.52 : x
  2. Step 2: Convert to fraction form
    21,488.92/29,654.80 = 12,057.52/x
  3. Step 3: Cross multiply
    21,488.92x = 29,654.80 × 12,057.52
  4. Step 4: Simplify right side
    21,488.92x = 357,563,344.10
  5. Step 5: Solve for x
    x = 357,563,344.10/21,488.92
  6. Step 6: Final answer
    x = 16,639.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.