Home / 3,107.57-4,289.11-1,912.55

Finding the Fourth Proportional to 3,107.57, 4,289.11 and 1,912.55

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Solution

The fourth proportional to 3,107.57, 4,289.11 and 1,912.55 is: 2,639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.57 : 4,289.11 = 1,912.55 : x
  2. Step 2: Convert to fraction form
    3,107.57/4,289.11 = 1,912.55/x
  3. Step 3: Cross multiply
    3,107.57x = 4,289.11 × 1,912.55
  4. Step 4: Simplify right side
    3,107.57x = 8,203,137.33
  5. Step 5: Solve for x
    x = 8,203,137.33/3,107.57
  6. Step 6: Final answer
    x = 2,639.73

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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.