Home / 2,688.11-4,028.39-2,137.85

Finding the Fourth Proportional to 2,688.11, 4,028.39 and 2,137.85

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Solution

The fourth proportional to 2,688.11, 4,028.39 and 2,137.85 is: 3,203.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.11 : 4,028.39 = 2,137.85 : x
  2. Step 2: Convert to fraction form
    2,688.11/4,028.39 = 2,137.85/x
  3. Step 3: Cross multiply
    2,688.11x = 4,028.39 × 2,137.85
  4. Step 4: Simplify right side
    2,688.11x = 8,612,082.87
  5. Step 5: Solve for x
    x = 8,612,082.87/2,688.11
  6. Step 6: Final answer
    x = 3,203.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.