Home / 3,876.30-5,349.33-2,107.86

Finding the Fourth Proportional to 3,876.30, 5,349.33 and 2,107.86

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Solution

The fourth proportional to 3,876.30, 5,349.33 and 2,107.86 is: 2,908.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.30 : 5,349.33 = 2,107.86 : x
  2. Step 2: Convert to fraction form
    3,876.30/5,349.33 = 2,107.86/x
  3. Step 3: Cross multiply
    3,876.30x = 5,349.33 × 2,107.86
  4. Step 4: Simplify right side
    3,876.30x = 11,275,638.73
  5. Step 5: Solve for x
    x = 11,275,638.73/3,876.30
  6. Step 6: Final answer
    x = 2,908.87

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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.