Home / 3,909.61-5,394.66-2,231.08

Finding the Fourth Proportional to 3,909.61, 5,394.66 and 2,231.08

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Solution

The fourth proportional to 3,909.61, 5,394.66 and 2,231.08 is: 3,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.61 : 5,394.66 = 2,231.08 : x
  2. Step 2: Convert to fraction form
    3,909.61/5,394.66 = 2,231.08/x
  3. Step 3: Cross multiply
    3,909.61x = 5,394.66 × 2,231.08
  4. Step 4: Simplify right side
    3,909.61x = 12,035,918.03
  5. Step 5: Solve for x
    x = 12,035,918.03/3,909.61
  6. Step 6: Final answer
    x = 3,078.55

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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.