Home / 20,932.04-31,391.97-7,781.28

Finding the Fourth Proportional to 20,932.04, 31,391.97 and 7,781.28

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Solution

The fourth proportional to 20,932.04, 31,391.97 and 7,781.28 is: 11,669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.04 : 31,391.97 = 7,781.28 : x
  2. Step 2: Convert to fraction form
    20,932.04/31,391.97 = 7,781.28/x
  3. Step 3: Cross multiply
    20,932.04x = 31,391.97 × 7,781.28
  4. Step 4: Simplify right side
    20,932.04x = 244,269,708.32
  5. Step 5: Solve for x
    x = 244,269,708.32/20,932.04
  6. Step 6: Final answer
    x = 11,669.66

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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.