Home / 3,711.38-5,121.70-2,139.47

Finding the Fourth Proportional to 3,711.38, 5,121.70 and 2,139.47

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Solution

The fourth proportional to 3,711.38, 5,121.70 and 2,139.47 is: 2,952.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.38 : 5,121.70 = 2,139.47 : x
  2. Step 2: Convert to fraction form
    3,711.38/5,121.70 = 2,139.47/x
  3. Step 3: Cross multiply
    3,711.38x = 5,121.70 × 2,139.47
  4. Step 4: Simplify right side
    3,711.38x = 10,957,711.75
  5. Step 5: Solve for x
    x = 10,957,711.75/3,711.38
  6. Step 6: Final answer
    x = 2,952.47

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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.