Home / 3,830.85-5,286.80-2,884.97

Finding the Fourth Proportional to 3,830.85, 5,286.80 and 2,884.97

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Solution

The fourth proportional to 3,830.85, 5,286.80 and 2,884.97 is: 3,981.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.85 : 5,286.80 = 2,884.97 : x
  2. Step 2: Convert to fraction form
    3,830.85/5,286.80 = 2,884.97/x
  3. Step 3: Cross multiply
    3,830.85x = 5,286.80 × 2,884.97
  4. Step 4: Simplify right side
    3,830.85x = 15,252,263.60
  5. Step 5: Solve for x
    x = 15,252,263.60/3,830.85
  6. Step 6: Final answer
    x = 3,981.43

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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.