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Finding the Fourth Proportional to 15,767.87, 21,737.03 and 12,404.86

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Solution

The fourth proportional to 15,767.87, 21,737.03 and 12,404.86 is: 17,100.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,767.87 : 21,737.03 = 12,404.86 : x
  2. Step 2: Convert to fraction form
    15,767.87/21,737.03 = 12,404.86/x
  3. Step 3: Cross multiply
    15,767.87x = 21,737.03 × 12,404.86
  4. Step 4: Simplify right side
    15,767.87x = 269,644,697.60
  5. Step 5: Solve for x
    x = 269,644,697.60/15,767.87
  6. Step 6: Final answer
    x = 17,100.90

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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.