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Finding the Fourth Proportional to 13,677.92, 18,877.92 and 8,089.28

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Solution

The fourth proportional to 13,677.92, 18,877.92 and 8,089.28 is: 11,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,677.92 : 18,877.92 = 8,089.28 : x
  2. Step 2: Convert to fraction form
    13,677.92/18,877.92 = 8,089.28/x
  3. Step 3: Cross multiply
    13,677.92x = 18,877.92 × 8,089.28
  4. Step 4: Simplify right side
    13,677.92x = 152,708,780.70
  5. Step 5: Solve for x
    x = 152,708,780.70/13,677.92
  6. Step 6: Final answer
    x = 11,164.62

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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.