Home / 3,906.41-5,390.83-2,138.01

Finding the Fourth Proportional to 3,906.41, 5,390.83 and 2,138.01

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Solution

The fourth proportional to 3,906.41, 5,390.83 and 2,138.01 is: 2,950.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.41 : 5,390.83 = 2,138.01 : x
  2. Step 2: Convert to fraction form
    3,906.41/5,390.83 = 2,138.01/x
  3. Step 3: Cross multiply
    3,906.41x = 5,390.83 × 2,138.01
  4. Step 4: Simplify right side
    3,906.41x = 11,525,630.91
  5. Step 5: Solve for x
    x = 11,525,630.91/3,906.41
  6. Step 6: Final answer
    x = 2,950.44

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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.