Home / 3,833.20-5,286.90-2,889.28

Finding the Fourth Proportional to 3,833.20, 5,286.90 and 2,889.28

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Solution

The fourth proportional to 3,833.20, 5,286.90 and 2,889.28 is: 3,985.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,833.20 : 5,286.90 = 2,889.28 : x
  2. Step 2: Convert to fraction form
    3,833.20/5,286.90 = 2,889.28/x
  3. Step 3: Cross multiply
    3,833.20x = 5,286.90 × 2,889.28
  4. Step 4: Simplify right side
    3,833.20x = 15,275,334.43
  5. Step 5: Solve for x
    x = 15,275,334.43/3,833.20
  6. Step 6: Final answer
    x = 3,985.01

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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.