Home / 20,288-27,996.36-11,335.88

Finding the Fourth Proportional to 20,288, 27,996.36 and 11,335.88

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Solution

The fourth proportional to 20,288, 27,996.36 and 11,335.88 is: 15,642.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288 : 27,996.36 = 11,335.88 : x
  2. Step 2: Convert to fraction form
    20,288/27,996.36 = 11,335.88/x
  3. Step 3: Cross multiply
    20,288x = 27,996.36 × 11,335.88
  4. Step 4: Simplify right side
    20,288x = 317,363,377.40
  5. Step 5: Solve for x
    x = 317,363,377.40/20,288
  6. Step 6: Final answer
    x = 15,642.91

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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.