Home / 5,120.91-7,679.95-2,198.54

Finding the Fourth Proportional to 5,120.91, 7,679.95 and 2,198.54

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Solution

The fourth proportional to 5,120.91, 7,679.95 and 2,198.54 is: 3,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.91 : 7,679.95 = 2,198.54 : x
  2. Step 2: Convert to fraction form
    5,120.91/7,679.95 = 2,198.54/x
  3. Step 3: Cross multiply
    5,120.91x = 7,679.95 × 2,198.54
  4. Step 4: Simplify right side
    5,120.91x = 16,884,690.98
  5. Step 5: Solve for x
    x = 16,884,690.98/5,120.91
  6. Step 6: Final answer
    x = 3,297.21

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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.