Home / 3,121.37-4,680.03-2,191.76

Finding the Fourth Proportional to 3,121.37, 4,680.03 and 2,191.76

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Solution

The fourth proportional to 3,121.37, 4,680.03 and 2,191.76 is: 3,286.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.37 : 4,680.03 = 2,191.76 : x
  2. Step 2: Convert to fraction form
    3,121.37/4,680.03 = 2,191.76/x
  3. Step 3: Cross multiply
    3,121.37x = 4,680.03 × 2,191.76
  4. Step 4: Simplify right side
    3,121.37x = 10,257,502.55
  5. Step 5: Solve for x
    x = 10,257,502.55/3,121.37
  6. Step 6: Final answer
    x = 3,286.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.