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Finding the Fourth Proportional to 17,855.52, 26,761.68 and 12,890.76

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Solution

The fourth proportional to 17,855.52, 26,761.68 and 12,890.76 is: 19,320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,855.52 : 26,761.68 = 12,890.76 : x
  2. Step 2: Convert to fraction form
    17,855.52/26,761.68 = 12,890.76/x
  3. Step 3: Cross multiply
    17,855.52x = 26,761.68 × 12,890.76
  4. Step 4: Simplify right side
    17,855.52x = 344,978,394.08
  5. Step 5: Solve for x
    x = 344,978,394.08/17,855.52
  6. Step 6: Final answer
    x = 19,320.55

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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.