Home / 21,855.18-32,759.82-11,991.54

Finding the Fourth Proportional to 21,855.18, 32,759.82 and 11,991.54

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Solution

The fourth proportional to 21,855.18, 32,759.82 and 11,991.54 is: 17,974.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.18 : 32,759.82 = 11,991.54 : x
  2. Step 2: Convert to fraction form
    21,855.18/32,759.82 = 11,991.54/x
  3. Step 3: Cross multiply
    21,855.18x = 32,759.82 × 11,991.54
  4. Step 4: Simplify right side
    21,855.18x = 392,840,691.92
  5. Step 5: Solve for x
    x = 392,840,691.92/21,855.18
  6. Step 6: Final answer
    x = 17,974.72

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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.