Home / 3,711.65-5,121.15-2,276.78

Finding the Fourth Proportional to 3,711.65, 5,121.15 and 2,276.78

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Solution

The fourth proportional to 3,711.65, 5,121.15 and 2,276.78 is: 3,141.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.65 : 5,121.15 = 2,276.78 : x
  2. Step 2: Convert to fraction form
    3,711.65/5,121.15 = 2,276.78/x
  3. Step 3: Cross multiply
    3,711.65x = 5,121.15 × 2,276.78
  4. Step 4: Simplify right side
    3,711.65x = 11,659,704.16
  5. Step 5: Solve for x
    x = 11,659,704.16/3,711.65
  6. Step 6: Final answer
    x = 3,141.38

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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.