Home / 21,581.44-29,781.96-12,149.80

Finding the Fourth Proportional to 21,581.44, 29,781.96 and 12,149.80

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Solution

The fourth proportional to 21,581.44, 29,781.96 and 12,149.80 is: 16,766.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.44 : 29,781.96 = 12,149.80 : x
  2. Step 2: Convert to fraction form
    21,581.44/29,781.96 = 12,149.80/x
  3. Step 3: Cross multiply
    21,581.44x = 29,781.96 × 12,149.80
  4. Step 4: Simplify right side
    21,581.44x = 361,844,857.61
  5. Step 5: Solve for x
    x = 361,844,857.61/21,581.44
  6. Step 6: Final answer
    x = 16,766.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.