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Finding the Fourth Proportional to 18,606.20, 27,909.30 and 5,459.90

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Solution

The fourth proportional to 18,606.20, 27,909.30 and 5,459.90 is: 8,189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.20 : 27,909.30 = 5,459.90 : x
  2. Step 2: Convert to fraction form
    18,606.20/27,909.30 = 5,459.90/x
  3. Step 3: Cross multiply
    18,606.20x = 27,909.30 × 5,459.90
  4. Step 4: Simplify right side
    18,606.20x = 152,381,987.07
  5. Step 5: Solve for x
    x = 152,381,987.07/18,606.20
  6. Step 6: Final answer
    x = 8,189.85

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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.