Home / 3,928.60-5,921.16-3,387.32

Finding the Fourth Proportional to 3,928.60, 5,921.16 and 3,387.32

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Solution

The fourth proportional to 3,928.60, 5,921.16 and 3,387.32 is: 5,105.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.60 : 5,921.16 = 3,387.32 : x
  2. Step 2: Convert to fraction form
    3,928.60/5,921.16 = 3,387.32/x
  3. Step 3: Cross multiply
    3,928.60x = 5,921.16 × 3,387.32
  4. Step 4: Simplify right side
    3,928.60x = 20,056,863.69
  5. Step 5: Solve for x
    x = 20,056,863.69/3,928.60
  6. Step 6: Final answer
    x = 5,105.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.