Home / 5,121.12-7,682.13-2,198.73

Finding the Fourth Proportional to 5,121.12, 7,682.13 and 2,198.73

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Solution

The fourth proportional to 5,121.12, 7,682.13 and 2,198.73 is: 3,298.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.12 : 7,682.13 = 2,198.73 : x
  2. Step 2: Convert to fraction form
    5,121.12/7,682.13 = 2,198.73/x
  3. Step 3: Cross multiply
    5,121.12x = 7,682.13 × 2,198.73
  4. Step 4: Simplify right side
    5,121.12x = 16,890,929.69
  5. Step 5: Solve for x
    x = 16,890,929.69/5,121.12
  6. Step 6: Final answer
    x = 3,298.29

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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.