Home / 3,113.28-4,286.88-2,865.60

Finding the Fourth Proportional to 3,113.28, 4,286.88 and 2,865.60

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Solution

The fourth proportional to 3,113.28, 4,286.88 and 2,865.60 is: 3,945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.28 : 4,286.88 = 2,865.60 : x
  2. Step 2: Convert to fraction form
    3,113.28/4,286.88 = 2,865.60/x
  3. Step 3: Cross multiply
    3,113.28x = 4,286.88 × 2,865.60
  4. Step 4: Simplify right side
    3,113.28x = 12,284,483.33
  5. Step 5: Solve for x
    x = 12,284,483.33/3,113.28
  6. Step 6: Final answer
    x = 3,945.83

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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.