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Finding the Fourth Proportional to 18,358.44, 27,539 and 5,211.76

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Solution

The fourth proportional to 18,358.44, 27,539 and 5,211.76 is: 7,818.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.44 : 27,539 = 5,211.76 : x
  2. Step 2: Convert to fraction form
    18,358.44/27,539 = 5,211.76/x
  3. Step 3: Cross multiply
    18,358.44x = 27,539 × 5,211.76
  4. Step 4: Simplify right side
    18,358.44x = 143,526,658.64
  5. Step 5: Solve for x
    x = 143,526,658.64/18,358.44
  6. Step 6: Final answer
    x = 7,818.02

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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.