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Finding the Fourth Proportional to 18,949.52, 28,412.13 and 7,863.86

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Solution

The fourth proportional to 18,949.52, 28,412.13 and 7,863.86 is: 11,790.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,949.52 : 28,412.13 = 7,863.86 : x
  2. Step 2: Convert to fraction form
    18,949.52/28,412.13 = 7,863.86/x
  3. Step 3: Cross multiply
    18,949.52x = 28,412.13 × 7,863.86
  4. Step 4: Simplify right side
    18,949.52x = 223,429,083.65
  5. Step 5: Solve for x
    x = 223,429,083.65/18,949.52
  6. Step 6: Final answer
    x = 11,790.75

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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.