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Finding the Fourth Proportional to 17,855.40, 26,778.30 and 5,375.40

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Solution

The fourth proportional to 17,855.40, 26,778.30 and 5,375.40 is: 8,061.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,855.40 : 26,778.30 = 5,375.40 : x
  2. Step 2: Convert to fraction form
    17,855.40/26,778.30 = 5,375.40/x
  3. Step 3: Cross multiply
    17,855.40x = 26,778.30 × 5,375.40
  4. Step 4: Simplify right side
    17,855.40x = 143,944,073.82
  5. Step 5: Solve for x
    x = 143,944,073.82/17,855.40
  6. Step 6: Final answer
    x = 8,061.65

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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.