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Finding the Fourth Proportional to 18,343.20, 27,499.68 and 7,245.12

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Solution

The fourth proportional to 18,343.20, 27,499.68 and 7,245.12 is: 10,861.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343.20 : 27,499.68 = 7,245.12 : x
  2. Step 2: Convert to fraction form
    18,343.20/27,499.68 = 7,245.12/x
  3. Step 3: Cross multiply
    18,343.20x = 27,499.68 × 7,245.12
  4. Step 4: Simplify right side
    18,343.20x = 199,238,481.56
  5. Step 5: Solve for x
    x = 199,238,481.56/18,343.20
  6. Step 6: Final answer
    x = 10,861.71

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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.