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Finding the Fourth Proportional to 8,078.73, 12,118.17 and 6,979.83

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Solution

The fourth proportional to 8,078.73, 12,118.17 and 6,979.83 is: 10,469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.73 : 12,118.17 = 6,979.83 : x
  2. Step 2: Convert to fraction form
    8,078.73/12,118.17 = 6,979.83/x
  3. Step 3: Cross multiply
    8,078.73x = 12,118.17 × 6,979.83
  4. Step 4: Simplify right side
    8,078.73x = 84,582,766.51
  5. Step 5: Solve for x
    x = 84,582,766.51/8,078.73
  6. Step 6: Final answer
    x = 10,469.81

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1.5x scale

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.