Home / 17,517.15-26,286.72-7,128.90

Finding the Fourth Proportional to 17,517.15, 26,286.72 and 7,128.90

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Solution

The fourth proportional to 17,517.15, 26,286.72 and 7,128.90 is: 10,697.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,517.15 : 26,286.72 = 7,128.90 : x
  2. Step 2: Convert to fraction form
    17,517.15/26,286.72 = 7,128.90/x
  3. Step 3: Cross multiply
    17,517.15x = 26,286.72 × 7,128.90
  4. Step 4: Simplify right side
    17,517.15x = 187,395,398.21
  5. Step 5: Solve for x
    x = 187,395,398.21/17,517.15
  6. Step 6: Final answer
    x = 10,697.82

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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.