Home / 3,830.25-5,286.20-2,151.66

Finding the Fourth Proportional to 3,830.25, 5,286.20 and 2,151.66

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Solution

The fourth proportional to 3,830.25, 5,286.20 and 2,151.66 is: 2,969.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.25 : 5,286.20 = 2,151.66 : x
  2. Step 2: Convert to fraction form
    3,830.25/5,286.20 = 2,151.66/x
  3. Step 3: Cross multiply
    3,830.25x = 5,286.20 × 2,151.66
  4. Step 4: Simplify right side
    3,830.25x = 11,374,105.09
  5. Step 5: Solve for x
    x = 11,374,105.09/3,830.25
  6. Step 6: Final answer
    x = 2,969.55

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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.