Home / 3,930.94-5,424.66-2,138.41

Finding the Fourth Proportional to 3,930.94, 5,424.66 and 2,138.41

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Solution

The fourth proportional to 3,930.94, 5,424.66 and 2,138.41 is: 2,950.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.94 : 5,424.66 = 2,138.41 : x
  2. Step 2: Convert to fraction form
    3,930.94/5,424.66 = 2,138.41/x
  3. Step 3: Cross multiply
    3,930.94x = 5,424.66 × 2,138.41
  4. Step 4: Simplify right side
    3,930.94x = 11,600,147.19
  5. Step 5: Solve for x
    x = 11,600,147.19/3,930.94
  6. Step 6: Final answer
    x = 2,950.99

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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.