Home / 3,896.40-5,838.20-3,243.60

Finding the Fourth Proportional to 3,896.40, 5,838.20 and 3,243.60

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Solution

The fourth proportional to 3,896.40, 5,838.20 and 3,243.60 is: 4,860.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.40 : 5,838.20 = 3,243.60 : x
  2. Step 2: Convert to fraction form
    3,896.40/5,838.20 = 3,243.60/x
  3. Step 3: Cross multiply
    3,896.40x = 5,838.20 × 3,243.60
  4. Step 4: Simplify right side
    3,896.40x = 18,936,785.52
  5. Step 5: Solve for x
    x = 18,936,785.52/3,896.40
  6. Step 6: Final answer
    x = 4,860.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.