Home / 3,876.19-5,349.13-2,107.80

Finding the Fourth Proportional to 3,876.19, 5,349.13 and 2,107.80

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Solution

The fourth proportional to 3,876.19, 5,349.13 and 2,107.80 is: 2,908.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.19 : 5,349.13 = 2,107.80 : x
  2. Step 2: Convert to fraction form
    3,876.19/5,349.13 = 2,107.80/x
  3. Step 3: Cross multiply
    3,876.19x = 5,349.13 × 2,107.80
  4. Step 4: Simplify right side
    3,876.19x = 11,274,896.21
  5. Step 5: Solve for x
    x = 11,274,896.21/3,876.19
  6. Step 6: Final answer
    x = 2,908.76

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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.