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Finding the Fourth Proportional to 20,562.88, 30,787.02 and 13,149.04

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Solution

The fourth proportional to 20,562.88, 30,787.02 and 13,149.04 is: 19,686.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.88 : 30,787.02 = 13,149.04 : x
  2. Step 2: Convert to fraction form
    20,562.88/30,787.02 = 13,149.04/x
  3. Step 3: Cross multiply
    20,562.88x = 30,787.02 × 13,149.04
  4. Step 4: Simplify right side
    20,562.88x = 404,819,757.46
  5. Step 5: Solve for x
    x = 404,819,757.46/20,562.88
  6. Step 6: Final answer
    x = 19,686.92

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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.