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Finding the Fourth Proportional to 18,489.28, 27,750.39 and 8,634.01

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Solution

The fourth proportional to 18,489.28, 27,750.39 and 8,634.01 is: 12,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.28 : 27,750.39 = 8,634.01 : x
  2. Step 2: Convert to fraction form
    18,489.28/27,750.39 = 8,634.01/x
  3. Step 3: Cross multiply
    18,489.28x = 27,750.39 × 8,634.01
  4. Step 4: Simplify right side
    18,489.28x = 239,597,144.76
  5. Step 5: Solve for x
    x = 239,597,144.76/18,489.28
  6. Step 6: Final answer
    x = 12,958.71

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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.