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Finding the Fourth Proportional to 12,791.13, 17,651.22 and 7,125.57

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Solution

The fourth proportional to 12,791.13, 17,651.22 and 7,125.57 is: 9,832.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.13 : 17,651.22 = 7,125.57 : x
  2. Step 2: Convert to fraction form
    12,791.13/17,651.22 = 7,125.57/x
  3. Step 3: Cross multiply
    12,791.13x = 17,651.22 × 7,125.57
  4. Step 4: Simplify right side
    12,791.13x = 125,775,003.70
  5. Step 5: Solve for x
    x = 125,775,003.70/12,791.13
  6. Step 6: Final answer
    x = 9,832.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.