Home / 3,876.81-5,350.05-2,108.45

Finding the Fourth Proportional to 3,876.81, 5,350.05 and 2,108.45

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Solution

The fourth proportional to 3,876.81, 5,350.05 and 2,108.45 is: 2,909.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.81 : 5,350.05 = 2,108.45 : x
  2. Step 2: Convert to fraction form
    3,876.81/5,350.05 = 2,108.45/x
  3. Step 3: Cross multiply
    3,876.81x = 5,350.05 × 2,108.45
  4. Step 4: Simplify right side
    3,876.81x = 11,280,286.17
  5. Step 5: Solve for x
    x = 11,280,286.17/3,876.81
  6. Step 6: Final answer
    x = 2,909.68

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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.