Home / 3,859.20-5,318.40-3,801.60

Finding the Fourth Proportional to 3,859.20, 5,318.40 and 3,801.60

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Solution

The fourth proportional to 3,859.20, 5,318.40 and 3,801.60 is: 5,239.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.20 : 5,318.40 = 3,801.60 : x
  2. Step 2: Convert to fraction form
    3,859.20/5,318.40 = 3,801.60/x
  3. Step 3: Cross multiply
    3,859.20x = 5,318.40 × 3,801.60
  4. Step 4: Simplify right side
    3,859.20x = 20,218,429.44
  5. Step 5: Solve for x
    x = 20,218,429.44/3,859.20
  6. Step 6: Final answer
    x = 5,239.02

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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.