Home / 3,900.50-5,382.70-2,132.12

Finding the Fourth Proportional to 3,900.50, 5,382.70 and 2,132.12

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Solution

The fourth proportional to 3,900.50, 5,382.70 and 2,132.12 is: 2,942.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.50 : 5,382.70 = 2,132.12 : x
  2. Step 2: Convert to fraction form
    3,900.50/5,382.70 = 2,132.12/x
  3. Step 3: Cross multiply
    3,900.50x = 5,382.70 × 2,132.12
  4. Step 4: Simplify right side
    3,900.50x = 11,476,582.44
  5. Step 5: Solve for x
    x = 11,476,582.44/3,900.50
  6. Step 6: Final answer
    x = 2,942.33

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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.