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Finding the Fourth Proportional to 26,912.80, 40,340.40 and 12,119.20

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Solution

The fourth proportional to 26,912.80, 40,340.40 and 12,119.20 is: 18,165.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,912.80 : 40,340.40 = 12,119.20 : x
  2. Step 2: Convert to fraction form
    26,912.80/40,340.40 = 12,119.20/x
  3. Step 3: Cross multiply
    26,912.80x = 40,340.40 × 12,119.20
  4. Step 4: Simplify right side
    26,912.80x = 488,893,375.68
  5. Step 5: Solve for x
    x = 488,893,375.68/26,912.80
  6. Step 6: Final answer
    x = 18,165.83

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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.