Home / 21,722.13-29,960.13-15,018.97

Finding the Fourth Proportional to 21,722.13, 29,960.13 and 15,018.97

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Solution

The fourth proportional to 21,722.13, 29,960.13 and 15,018.97 is: 20,714.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.13 : 29,960.13 = 15,018.97 : x
  2. Step 2: Convert to fraction form
    21,722.13/29,960.13 = 15,018.97/x
  3. Step 3: Cross multiply
    21,722.13x = 29,960.13 × 15,018.97
  4. Step 4: Simplify right side
    21,722.13x = 449,970,293.67
  5. Step 5: Solve for x
    x = 449,970,293.67/21,722.13
  6. Step 6: Final answer
    x = 20,714.83

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1.5x scale

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.