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Finding the Fourth Proportional to 8,287.92, 12,431.46 and 3,093.39

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Solution

The fourth proportional to 8,287.92, 12,431.46 and 3,093.39 is: 4,639.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,287.92 : 12,431.46 = 3,093.39 : x
  2. Step 2: Convert to fraction form
    8,287.92/12,431.46 = 3,093.39/x
  3. Step 3: Cross multiply
    8,287.92x = 12,431.46 × 3,093.39
  4. Step 4: Simplify right side
    8,287.92x = 38,455,354.05
  5. Step 5: Solve for x
    x = 38,455,354.05/8,287.92
  6. Step 6: Final answer
    x = 4,639.93

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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.