Home / 3,934-5,428.38-2,165.32

Finding the Fourth Proportional to 3,934, 5,428.38 and 2,165.32

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Solution

The fourth proportional to 3,934, 5,428.38 and 2,165.32 is: 2,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934 : 5,428.38 = 2,165.32 : x
  2. Step 2: Convert to fraction form
    3,934/5,428.38 = 2,165.32/x
  3. Step 3: Cross multiply
    3,934x = 5,428.38 × 2,165.32
  4. Step 4: Simplify right side
    3,934x = 11,754,179.78
  5. Step 5: Solve for x
    x = 11,754,179.78/3,934
  6. Step 6: Final answer
    x = 2,987.84

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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.