Home / 3,121.24-4,684.68-2,791.68

Finding the Fourth Proportional to 3,121.24, 4,684.68 and 2,791.68

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Solution

The fourth proportional to 3,121.24, 4,684.68 and 2,791.68 is: 4,190.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.24 : 4,684.68 = 2,791.68 : x
  2. Step 2: Convert to fraction form
    3,121.24/4,684.68 = 2,791.68/x
  3. Step 3: Cross multiply
    3,121.24x = 4,684.68 × 2,791.68
  4. Step 4: Simplify right side
    3,121.24x = 13,078,127.46
  5. Step 5: Solve for x
    x = 13,078,127.46/3,121.24
  6. Step 6: Final answer
    x = 4,190.04

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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.