Home / 3,940.45-5,908.95-2,091.15

Finding the Fourth Proportional to 3,940.45, 5,908.95 and 2,091.15

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Solution

The fourth proportional to 3,940.45, 5,908.95 and 2,091.15 is: 3,135.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.45 : 5,908.95 = 2,091.15 : x
  2. Step 2: Convert to fraction form
    3,940.45/5,908.95 = 2,091.15/x
  3. Step 3: Cross multiply
    3,940.45x = 5,908.95 × 2,091.15
  4. Step 4: Simplify right side
    3,940.45x = 12,356,500.79
  5. Step 5: Solve for x
    x = 12,356,500.79/3,940.45
  6. Step 6: Final answer
    x = 3,135.81

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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.