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Finding the Fourth Proportional to 12,479.85, 18,714.62 and 5,079.29

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Solution

The fourth proportional to 12,479.85, 18,714.62 and 5,079.29 is: 7,616.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.85 : 18,714.62 = 5,079.29 : x
  2. Step 2: Convert to fraction form
    12,479.85/18,714.62 = 5,079.29/x
  3. Step 3: Cross multiply
    12,479.85x = 18,714.62 × 5,079.29
  4. Step 4: Simplify right side
    12,479.85x = 95,056,863.25
  5. Step 5: Solve for x
    x = 95,056,863.25/12,479.85
  6. Step 6: Final answer
    x = 7,616.83

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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.