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Finding the Fourth Proportional to 13,737.80, 20,597.70 and 5,412.80

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Solution

The fourth proportional to 13,737.80, 20,597.70 and 5,412.80 is: 8,115.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,737.80 : 20,597.70 = 5,412.80 : x
  2. Step 2: Convert to fraction form
    13,737.80/20,597.70 = 5,412.80/x
  3. Step 3: Cross multiply
    13,737.80x = 20,597.70 × 5,412.80
  4. Step 4: Simplify right side
    13,737.80x = 111,491,230.56
  5. Step 5: Solve for x
    x = 111,491,230.56/13,737.80
  6. Step 6: Final answer
    x = 8,115.65

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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.