Home / 21,721.13-29,958.75-15,017.97

Finding the Fourth Proportional to 21,721.13, 29,958.75 and 15,017.97

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Solution

The fourth proportional to 21,721.13, 29,958.75 and 15,017.97 is: 20,713.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.13 : 29,958.75 = 15,017.97 : x
  2. Step 2: Convert to fraction form
    21,721.13/29,958.75 = 15,017.97/x
  3. Step 3: Cross multiply
    21,721.13x = 29,958.75 × 15,017.97
  4. Step 4: Simplify right side
    21,721.13x = 449,919,608.74
  5. Step 5: Solve for x
    x = 449,919,608.74/21,721.13
  6. Step 6: Final answer
    x = 20,713.46

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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.