Home / 3,906.36-5,390.74-2,137.96

Finding the Fourth Proportional to 3,906.36, 5,390.74 and 2,137.96

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Solution

The fourth proportional to 3,906.36, 5,390.74 and 2,137.96 is: 2,950.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.36 : 5,390.74 = 2,137.96 : x
  2. Step 2: Convert to fraction form
    3,906.36/5,390.74 = 2,137.96/x
  3. Step 3: Cross multiply
    3,906.36x = 5,390.74 × 2,137.96
  4. Step 4: Simplify right side
    3,906.36x = 11,525,148.85
  5. Step 5: Solve for x
    x = 11,525,148.85/3,906.36
  6. Step 6: Final answer
    x = 2,950.36

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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.