Home / 3,425.28-5,129.82-2,689.80

Finding the Fourth Proportional to 3,425.28, 5,129.82 and 2,689.80

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Solution

The fourth proportional to 3,425.28, 5,129.82 and 2,689.80 is: 4,028.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.28 : 5,129.82 = 2,689.80 : x
  2. Step 2: Convert to fraction form
    3,425.28/5,129.82 = 2,689.80/x
  3. Step 3: Cross multiply
    3,425.28x = 5,129.82 × 2,689.80
  4. Step 4: Simplify right side
    3,425.28x = 13,798,189.84
  5. Step 5: Solve for x
    x = 13,798,189.84/3,425.28
  6. Step 6: Final answer
    x = 4,028.34

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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.