Home / 3,934.30-5,429.20-2,165.90

Finding the Fourth Proportional to 3,934.30, 5,429.20 and 2,165.90

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Solution

The fourth proportional to 3,934.30, 5,429.20 and 2,165.90 is: 2,988.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.30 : 5,429.20 = 2,165.90 : x
  2. Step 2: Convert to fraction form
    3,934.30/5,429.20 = 2,165.90/x
  3. Step 3: Cross multiply
    3,934.30x = 5,429.20 × 2,165.90
  4. Step 4: Simplify right side
    3,934.30x = 11,759,104.28
  5. Step 5: Solve for x
    x = 11,759,104.28/3,934.30
  6. Step 6: Final answer
    x = 2,988.87

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1.5x scale

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.