Home / 3,639.20-5,022.30-2,147.60

Finding the Fourth Proportional to 3,639.20, 5,022.30 and 2,147.60

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Solution

The fourth proportional to 3,639.20, 5,022.30 and 2,147.60 is: 2,963.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.20 : 5,022.30 = 2,147.60 : x
  2. Step 2: Convert to fraction form
    3,639.20/5,022.30 = 2,147.60/x
  3. Step 3: Cross multiply
    3,639.20x = 5,022.30 × 2,147.60
  4. Step 4: Simplify right side
    3,639.20x = 10,785,891.48
  5. Step 5: Solve for x
    x = 10,785,891.48/3,639.20
  6. Step 6: Final answer
    x = 2,963.81

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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.