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Finding the Fourth Proportional to 21,909.24, 32,865.68 and 8,754.44

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Solution

The fourth proportional to 21,909.24, 32,865.68 and 8,754.44 is: 13,132.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.24 : 32,865.68 = 8,754.44 : x
  2. Step 2: Convert to fraction form
    21,909.24/32,865.68 = 8,754.44/x
  3. Step 3: Cross multiply
    21,909.24x = 32,865.68 × 8,754.44
  4. Step 4: Simplify right side
    21,909.24x = 287,720,623.62
  5. Step 5: Solve for x
    x = 287,720,623.62/21,909.24
  6. Step 6: Final answer
    x = 13,132.39

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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.