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Finding the Fourth Proportional to 12,109.92, 16,704.92 and 11,253.66

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Solution

The fourth proportional to 12,109.92, 16,704.92 and 11,253.66 is: 15,523.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.92 : 16,704.92 = 11,253.66 : x
  2. Step 2: Convert to fraction form
    12,109.92/16,704.92 = 11,253.66/x
  3. Step 3: Cross multiply
    12,109.92x = 16,704.92 × 11,253.66
  4. Step 4: Simplify right side
    12,109.92x = 187,991,518.14
  5. Step 5: Solve for x
    x = 187,991,518.14/12,109.92
  6. Step 6: Final answer
    x = 15,523.76

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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.