Home / 3,121.70-4,687.95-2,030.90

Finding the Fourth Proportional to 3,121.70, 4,687.95 and 2,030.90

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Solution

The fourth proportional to 3,121.70, 4,687.95 and 2,030.90 is: 3,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.70 : 4,687.95 = 2,030.90 : x
  2. Step 2: Convert to fraction form
    3,121.70/4,687.95 = 2,030.90/x
  3. Step 3: Cross multiply
    3,121.70x = 4,687.95 × 2,030.90
  4. Step 4: Simplify right side
    3,121.70x = 9,520,757.66
  5. Step 5: Solve for x
    x = 9,520,757.66/3,121.70
  6. Step 6: Final answer
    x = 3,049.86

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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.