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Finding the Fourth Proportional to 21,454.28, 29,596.90 and 13,500.90

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Solution

The fourth proportional to 21,454.28, 29,596.90 and 13,500.90 is: 18,624.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,454.28 : 29,596.90 = 13,500.90 : x
  2. Step 2: Convert to fraction form
    21,454.28/29,596.90 = 13,500.90/x
  3. Step 3: Cross multiply
    21,454.28x = 29,596.90 × 13,500.90
  4. Step 4: Simplify right side
    21,454.28x = 399,584,787.21
  5. Step 5: Solve for x
    x = 399,584,787.21/21,454.28
  6. Step 6: Final answer
    x = 18,624.95

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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.