Home / 21,691.92-32,511.24-12,339.75

Finding the Fourth Proportional to 21,691.92, 32,511.24 and 12,339.75

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Solution

The fourth proportional to 21,691.92, 32,511.24 and 12,339.75 is: 18,494.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.92 : 32,511.24 = 12,339.75 : x
  2. Step 2: Convert to fraction form
    21,691.92/32,511.24 = 12,339.75/x
  3. Step 3: Cross multiply
    21,691.92x = 32,511.24 × 12,339.75
  4. Step 4: Simplify right side
    21,691.92x = 401,180,573.79
  5. Step 5: Solve for x
    x = 401,180,573.79/21,691.92
  6. Step 6: Final answer
    x = 18,494.47

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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.