Home / 5,129.26-7,077.04-3,139.09

Finding the Fourth Proportional to 5,129.26, 7,077.04 and 3,139.09

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Solution

The fourth proportional to 5,129.26, 7,077.04 and 3,139.09 is: 4,331.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.26 : 7,077.04 = 3,139.09 : x
  2. Step 2: Convert to fraction form
    5,129.26/7,077.04 = 3,139.09/x
  3. Step 3: Cross multiply
    5,129.26x = 7,077.04 × 3,139.09
  4. Step 4: Simplify right side
    5,129.26x = 22,215,439.95
  5. Step 5: Solve for x
    x = 22,215,439.95/5,129.26
  6. Step 6: Final answer
    x = 4,331.12

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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.