Home / 3,876.72-5,349.63-2,108.31

Finding the Fourth Proportional to 3,876.72, 5,349.63 and 2,108.31

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Solution

The fourth proportional to 3,876.72, 5,349.63 and 2,108.31 is: 2,909.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.72 : 5,349.63 = 2,108.31 : x
  2. Step 2: Convert to fraction form
    3,876.72/5,349.63 = 2,108.31/x
  3. Step 3: Cross multiply
    3,876.72x = 5,349.63 × 2,108.31
  4. Step 4: Simplify right side
    3,876.72x = 11,278,678.43
  5. Step 5: Solve for x
    x = 11,278,678.43/3,876.72
  6. Step 6: Final answer
    x = 2,909.34

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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.