Home / 3,155.60-4,355.44-1,961.12

Finding the Fourth Proportional to 3,155.60, 4,355.44 and 1,961.12

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Solution

The fourth proportional to 3,155.60, 4,355.44 and 1,961.12 is: 2,706.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.60 : 4,355.44 = 1,961.12 : x
  2. Step 2: Convert to fraction form
    3,155.60/4,355.44 = 1,961.12/x
  3. Step 3: Cross multiply
    3,155.60x = 4,355.44 × 1,961.12
  4. Step 4: Simplify right side
    3,155.60x = 8,541,540.49
  5. Step 5: Solve for x
    x = 8,541,540.49/3,155.60
  6. Step 6: Final answer
    x = 2,706.79

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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.