Home / 3,900.37-5,382.51-2,131.97

Finding the Fourth Proportional to 3,900.37, 5,382.51 and 2,131.97

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Solution

The fourth proportional to 3,900.37, 5,382.51 and 2,131.97 is: 2,942.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.37 : 5,382.51 = 2,131.97 : x
  2. Step 2: Convert to fraction form
    3,900.37/5,382.51 = 2,131.97/x
  3. Step 3: Cross multiply
    3,900.37x = 5,382.51 × 2,131.97
  4. Step 4: Simplify right side
    3,900.37x = 11,475,357.97
  5. Step 5: Solve for x
    x = 11,475,357.97/3,900.37
  6. Step 6: Final answer
    x = 2,942.12

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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.