Home / 8,115.45-12,168.48-3,179.31

Finding the Fourth Proportional to 8,115.45, 12,168.48 and 3,179.31

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Solution

The fourth proportional to 8,115.45, 12,168.48 and 3,179.31 is: 4,767.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.45 : 12,168.48 = 3,179.31 : x
  2. Step 2: Convert to fraction form
    8,115.45/12,168.48 = 3,179.31/x
  3. Step 3: Cross multiply
    8,115.45x = 12,168.48 × 3,179.31
  4. Step 4: Simplify right side
    8,115.45x = 38,687,370.15
  5. Step 5: Solve for x
    x = 38,687,370.15/8,115.45
  6. Step 6: Final answer
    x = 4,767.13

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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.