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Finding the Fourth Proportional to 21,169.96, 29,201.22 and 13,717.48

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Solution

The fourth proportional to 21,169.96, 29,201.22 and 13,717.48 is: 18,921.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.96 : 29,201.22 = 13,717.48 : x
  2. Step 2: Convert to fraction form
    21,169.96/29,201.22 = 13,717.48/x
  3. Step 3: Cross multiply
    21,169.96x = 29,201.22 × 13,717.48
  4. Step 4: Simplify right side
    21,169.96x = 400,567,151.33
  5. Step 5: Solve for x
    x = 400,567,151.33/21,169.96
  6. Step 6: Final answer
    x = 18,921.49

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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.