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Finding the Fourth Proportional to 8,079.93, 12,118.68 and 2,815.74

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Solution

The fourth proportional to 8,079.93, 12,118.68 and 2,815.74 is: 4,223.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.93 : 12,118.68 = 2,815.74 : x
  2. Step 2: Convert to fraction form
    8,079.93/12,118.68 = 2,815.74/x
  3. Step 3: Cross multiply
    8,079.93x = 12,118.68 × 2,815.74
  4. Step 4: Simplify right side
    8,079.93x = 34,123,052.02
  5. Step 5: Solve for x
    x = 34,123,052.02/8,079.93
  6. Step 6: Final answer
    x = 4,223.19

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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.