Home / 20,972.19-31,489.26-13,995.66

Finding the Fourth Proportional to 20,972.19, 31,489.26 and 13,995.66

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Solution

The fourth proportional to 20,972.19, 31,489.26 and 13,995.66 is: 21,014.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.19 : 31,489.26 = 13,995.66 : x
  2. Step 2: Convert to fraction form
    20,972.19/31,489.26 = 13,995.66/x
  3. Step 3: Cross multiply
    20,972.19x = 31,489.26 × 13,995.66
  4. Step 4: Simplify right side
    20,972.19x = 440,712,976.61
  5. Step 5: Solve for x
    x = 440,712,976.61/20,972.19
  6. Step 6: Final answer
    x = 21,014.16

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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.