Home / 3,815.20-5,266.78-2,871.36

Finding the Fourth Proportional to 3,815.20, 5,266.78 and 2,871.36

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Solution

The fourth proportional to 3,815.20, 5,266.78 and 2,871.36 is: 3,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.20 : 5,266.78 = 2,871.36 : x
  2. Step 2: Convert to fraction form
    3,815.20/5,266.78 = 2,871.36/x
  3. Step 3: Cross multiply
    3,815.20x = 5,266.78 × 2,871.36
  4. Step 4: Simplify right side
    3,815.20x = 15,122,821.42
  5. Step 5: Solve for x
    x = 15,122,821.42/3,815.20
  6. Step 6: Final answer
    x = 3,963.83

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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.