Home / 3,876.72-5,349.80-2,108.34

Finding the Fourth Proportional to 3,876.72, 5,349.80 and 2,108.34

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Solution

The fourth proportional to 3,876.72, 5,349.80 and 2,108.34 is: 2,909.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.72 : 5,349.80 = 2,108.34 : x
  2. Step 2: Convert to fraction form
    3,876.72/5,349.80 = 2,108.34/x
  3. Step 3: Cross multiply
    3,876.72x = 5,349.80 × 2,108.34
  4. Step 4: Simplify right side
    3,876.72x = 11,279,197.33
  5. Step 5: Solve for x
    x = 11,279,197.33/3,876.72
  6. Step 6: Final answer
    x = 2,909.47

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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.