Home / 5,121.20-7,679.88-2,198

Finding the Fourth Proportional to 5,121.20, 7,679.88 and 2,198

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Solution

The fourth proportional to 5,121.20, 7,679.88 and 2,198 is: 3,296.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.20 : 7,679.88 = 2,198 : x
  2. Step 2: Convert to fraction form
    5,121.20/7,679.88 = 2,198/x
  3. Step 3: Cross multiply
    5,121.20x = 7,679.88 × 2,198
  4. Step 4: Simplify right side
    5,121.20x = 16,880,376.24
  5. Step 5: Solve for x
    x = 16,880,376.24/5,121.20
  6. Step 6: Final answer
    x = 3,296.18

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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.