Home / 3,711.62-5,121.30-2,139.38

Finding the Fourth Proportional to 3,711.62, 5,121.30 and 2,139.38

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Solution

The fourth proportional to 3,711.62, 5,121.30 and 2,139.38 is: 2,951.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.62 : 5,121.30 = 2,139.38 : x
  2. Step 2: Convert to fraction form
    3,711.62/5,121.30 = 2,139.38/x
  3. Step 3: Cross multiply
    3,711.62x = 5,121.30 × 2,139.38
  4. Step 4: Simplify right side
    3,711.62x = 10,956,406.79
  5. Step 5: Solve for x
    x = 10,956,406.79/3,711.62
  6. Step 6: Final answer
    x = 2,951.92

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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.