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Finding the Fourth Proportional to 21,265.92, 29,331.72 and 15,602.40

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Solution

The fourth proportional to 21,265.92, 29,331.72 and 15,602.40 is: 21,520.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.92 : 29,331.72 = 15,602.40 : x
  2. Step 2: Convert to fraction form
    21,265.92/29,331.72 = 15,602.40/x
  3. Step 3: Cross multiply
    21,265.92x = 29,331.72 × 15,602.40
  4. Step 4: Simplify right side
    21,265.92x = 457,645,228.13
  5. Step 5: Solve for x
    x = 457,645,228.13/21,265.92
  6. Step 6: Final answer
    x = 21,520.12

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