Home / 3,871.87-5,346.20-2,380.46

Finding the Fourth Proportional to 3,871.87, 5,346.20 and 2,380.46

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Solution

The fourth proportional to 3,871.87, 5,346.20 and 2,380.46 is: 3,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.87 : 5,346.20 = 2,380.46 : x
  2. Step 2: Convert to fraction form
    3,871.87/5,346.20 = 2,380.46/x
  3. Step 3: Cross multiply
    3,871.87x = 5,346.20 × 2,380.46
  4. Step 4: Simplify right side
    3,871.87x = 12,726,394.47
  5. Step 5: Solve for x
    x = 12,726,394.47/3,871.87
  6. Step 6: Final answer
    x = 3,286.89

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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.