Home / 20,232.47-27,920.80-11,279.78

Finding the Fourth Proportional to 20,232.47, 27,920.80 and 11,279.78

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Solution

The fourth proportional to 20,232.47, 27,920.80 and 11,279.78 is: 15,566.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,232.47 : 27,920.80 = 11,279.78 : x
  2. Step 2: Convert to fraction form
    20,232.47/27,920.80 = 11,279.78/x
  3. Step 3: Cross multiply
    20,232.47x = 27,920.80 × 11,279.78
  4. Step 4: Simplify right side
    20,232.47x = 314,940,481.42
  5. Step 5: Solve for x
    x = 314,940,481.42/20,232.47
  6. Step 6: Final answer
    x = 15,566.09

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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.