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Finding the Fourth Proportional to 8,309.78, 12,455.10 and 3,374

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Solution

The fourth proportional to 8,309.78, 12,455.10 and 3,374 is: 5,057.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,309.78 : 12,455.10 = 3,374 : x
  2. Step 2: Convert to fraction form
    8,309.78/12,455.10 = 3,374/x
  3. Step 3: Cross multiply
    8,309.78x = 12,455.10 × 3,374
  4. Step 4: Simplify right side
    8,309.78x = 42,023,507.40
  5. Step 5: Solve for x
    x = 42,023,507.40/8,309.78
  6. Step 6: Final answer
    x = 5,057.11

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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.