Home / 5,129.06-7,078.28-2,891.03

Finding the Fourth Proportional to 5,129.06, 7,078.28 and 2,891.03

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Solution

The fourth proportional to 5,129.06, 7,078.28 and 2,891.03 is: 3,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.06 : 7,078.28 = 2,891.03 : x
  2. Step 2: Convert to fraction form
    5,129.06/7,078.28 = 2,891.03/x
  3. Step 3: Cross multiply
    5,129.06x = 7,078.28 × 2,891.03
  4. Step 4: Simplify right side
    5,129.06x = 20,463,469.98
  5. Step 5: Solve for x
    x = 20,463,469.98/5,129.06
  6. Step 6: Final answer
    x = 3,989.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.