Home / 3,948.12-5,447.82-2,179.80

Finding the Fourth Proportional to 3,948.12, 5,447.82 and 2,179.80

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Solution

The fourth proportional to 3,948.12, 5,447.82 and 2,179.80 is: 3,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.12 : 5,447.82 = 2,179.80 : x
  2. Step 2: Convert to fraction form
    3,948.12/5,447.82 = 2,179.80/x
  3. Step 3: Cross multiply
    3,948.12x = 5,447.82 × 2,179.80
  4. Step 4: Simplify right side
    3,948.12x = 11,875,158.04
  5. Step 5: Solve for x
    x = 11,875,158.04/3,948.12
  6. Step 6: Final answer
    x = 3,007.80

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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.