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Finding the Fourth Proportional to 18,316.71, 27,414.90 and 13,909.89

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Solution

The fourth proportional to 18,316.71, 27,414.90 and 13,909.89 is: 20,819.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,316.71 : 27,414.90 = 13,909.89 : x
  2. Step 2: Convert to fraction form
    18,316.71/27,414.90 = 13,909.89/x
  3. Step 3: Cross multiply
    18,316.71x = 27,414.90 × 13,909.89
  4. Step 4: Simplify right side
    18,316.71x = 381,338,243.36
  5. Step 5: Solve for x
    x = 381,338,243.36/18,316.71
  6. Step 6: Final answer
    x = 20,819.15

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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.