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Finding the Fourth Proportional to 13,612.92, 18,780.96 and 8,899.92

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Solution

The fourth proportional to 13,612.92, 18,780.96 and 8,899.92 is: 12,278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.92 : 18,780.96 = 8,899.92 : x
  2. Step 2: Convert to fraction form
    13,612.92/18,780.96 = 8,899.92/x
  3. Step 3: Cross multiply
    13,612.92x = 18,780.96 × 8,899.92
  4. Step 4: Simplify right side
    13,612.92x = 167,149,041.52
  5. Step 5: Solve for x
    x = 167,149,041.52/13,612.92
  6. Step 6: Final answer
    x = 12,278.71

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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.