Home / 20,231.97-27,920.12-11,279.28

Finding the Fourth Proportional to 20,231.97, 27,920.12 and 11,279.28

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Solution

The fourth proportional to 20,231.97, 27,920.12 and 11,279.28 is: 15,565.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.97 : 27,920.12 = 11,279.28 : x
  2. Step 2: Convert to fraction form
    20,231.97/27,920.12 = 11,279.28/x
  3. Step 3: Cross multiply
    20,231.97x = 27,920.12 × 11,279.28
  4. Step 4: Simplify right side
    20,231.97x = 314,918,851.11
  5. Step 5: Solve for x
    x = 314,918,851.11/20,231.97
  6. Step 6: Final answer
    x = 15,565.41

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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.