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Finding the Fourth Proportional to 26,791.88, 40,188.72 and 10,781.21

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Solution

The fourth proportional to 26,791.88, 40,188.72 and 10,781.21 is: 16,172.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,791.88 : 40,188.72 = 10,781.21 : x
  2. Step 2: Convert to fraction form
    26,791.88/40,188.72 = 10,781.21/x
  3. Step 3: Cross multiply
    26,791.88x = 40,188.72 × 10,781.21
  4. Step 4: Simplify right side
    26,791.88x = 433,283,170.85
  5. Step 5: Solve for x
    x = 433,283,170.85/26,791.88
  6. Step 6: Final answer
    x = 16,172.19

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1.5x scale

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.