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Finding the Fourth Proportional to 18,494.52, 27,756.17 and 12,911.61

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Solution

The fourth proportional to 18,494.52, 27,756.17 and 12,911.61 is: 19,377.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,494.52 : 27,756.17 = 12,911.61 : x
  2. Step 2: Convert to fraction form
    18,494.52/27,756.17 = 12,911.61/x
  3. Step 3: Cross multiply
    18,494.52x = 27,756.17 × 12,911.61
  4. Step 4: Simplify right side
    18,494.52x = 358,376,777.58
  5. Step 5: Solve for x
    x = 358,376,777.58/18,494.52
  6. Step 6: Final answer
    x = 19,377.46

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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.