Home / 3,121.91-4,285.68-2,679.04

Finding the Fourth Proportional to 3,121.91, 4,285.68 and 2,679.04

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Solution

The fourth proportional to 3,121.91, 4,285.68 and 2,679.04 is: 3,677.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.91 : 4,285.68 = 2,679.04 : x
  2. Step 2: Convert to fraction form
    3,121.91/4,285.68 = 2,679.04/x
  3. Step 3: Cross multiply
    3,121.91x = 4,285.68 × 2,679.04
  4. Step 4: Simplify right side
    3,121.91x = 11,481,503.46
  5. Step 5: Solve for x
    x = 11,481,503.46/3,121.91
  6. Step 6: Final answer
    x = 3,677.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.