Home / 20,791.22-28,691.78-11,359.79

Finding the Fourth Proportional to 20,791.22, 28,691.78 and 11,359.79

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Solution

The fourth proportional to 20,791.22, 28,691.78 and 11,359.79 is: 15,676.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.22 : 28,691.78 = 11,359.79 : x
  2. Step 2: Convert to fraction form
    20,791.22/28,691.78 = 11,359.79/x
  3. Step 3: Cross multiply
    20,791.22x = 28,691.78 × 11,359.79
  4. Step 4: Simplify right side
    20,791.22x = 325,932,395.27
  5. Step 5: Solve for x
    x = 325,932,395.27/20,791.22
  6. Step 6: Final answer
    x = 15,676.44

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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.