Home / 3,791.28-5,231.92-2,112.69

Finding the Fourth Proportional to 3,791.28, 5,231.92 and 2,112.69

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Solution

The fourth proportional to 3,791.28, 5,231.92 and 2,112.69 is: 2,915.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,791.28 : 5,231.92 = 2,112.69 : x
  2. Step 2: Convert to fraction form
    3,791.28/5,231.92 = 2,112.69/x
  3. Step 3: Cross multiply
    3,791.28x = 5,231.92 × 2,112.69
  4. Step 4: Simplify right side
    3,791.28x = 11,053,425.06
  5. Step 5: Solve for x
    x = 11,053,425.06/3,791.28
  6. Step 6: Final answer
    x = 2,915.49

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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.