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Finding the Fourth Proportional to 18,894.92, 28,342.40 and 8,494.52

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Solution

The fourth proportional to 18,894.92, 28,342.40 and 8,494.52 is: 12,741.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.92 : 28,342.40 = 8,494.52 : x
  2. Step 2: Convert to fraction form
    18,894.92/28,342.40 = 8,494.52/x
  3. Step 3: Cross multiply
    18,894.92x = 28,342.40 × 8,494.52
  4. Step 4: Simplify right side
    18,894.92x = 240,754,899.46
  5. Step 5: Solve for x
    x = 240,754,899.46/18,894.92
  6. Step 6: Final answer
    x = 12,741.78

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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.