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Finding the Fourth Proportional to 13,909.29, 20,836.11 and 8,359.62

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Solution

The fourth proportional to 13,909.29, 20,836.11 and 8,359.62 is: 12,522.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.29 : 20,836.11 = 8,359.62 : x
  2. Step 2: Convert to fraction form
    13,909.29/20,836.11 = 8,359.62/x
  3. Step 3: Cross multiply
    13,909.29x = 20,836.11 × 8,359.62
  4. Step 4: Simplify right side
    13,909.29x = 174,181,961.88
  5. Step 5: Solve for x
    x = 174,181,961.88/13,909.29
  6. Step 6: Final answer
    x = 12,522.71

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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.