Home / 3,711.15-5,121.90-2,139.21

Finding the Fourth Proportional to 3,711.15, 5,121.90 and 2,139.21

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Solution

The fourth proportional to 3,711.15, 5,121.90 and 2,139.21 is: 2,952.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.15 : 5,121.90 = 2,139.21 : x
  2. Step 2: Convert to fraction form
    3,711.15/5,121.90 = 2,139.21/x
  3. Step 3: Cross multiply
    3,711.15x = 5,121.90 × 2,139.21
  4. Step 4: Simplify right side
    3,711.15x = 10,956,819.70
  5. Step 5: Solve for x
    x = 10,956,819.70/3,711.15
  6. Step 6: Final answer
    x = 2,952.41

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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.