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Finding the Fourth Proportional to 13,737.72, 20,635.72 and 12,937.88

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Solution

The fourth proportional to 13,737.72, 20,635.72 and 12,937.88 is: 19,434.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,737.72 : 20,635.72 = 12,937.88 : x
  2. Step 2: Convert to fraction form
    13,737.72/20,635.72 = 12,937.88/x
  3. Step 3: Cross multiply
    13,737.72x = 20,635.72 × 12,937.88
  4. Step 4: Simplify right side
    13,737.72x = 266,982,469.07
  5. Step 5: Solve for x
    x = 266,982,469.07/13,737.72
  6. Step 6: Final answer
    x = 19,434.26

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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.