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Finding the Fourth Proportional to 26,540.92, 39,820.02 and 12,691

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Solution

The fourth proportional to 26,540.92, 39,820.02 and 12,691 is: 19,040.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,540.92 : 39,820.02 = 12,691 : x
  2. Step 2: Convert to fraction form
    26,540.92/39,820.02 = 12,691/x
  3. Step 3: Cross multiply
    26,540.92x = 39,820.02 × 12,691
  4. Step 4: Simplify right side
    26,540.92x = 505,355,873.82
  5. Step 5: Solve for x
    x = 505,355,873.82/26,540.92
  6. Step 6: Final answer
    x = 19,040.63

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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.