Home / 3,900.45-5,382.65-2,132.09

Finding the Fourth Proportional to 3,900.45, 5,382.65 and 2,132.09

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Solution

The fourth proportional to 3,900.45, 5,382.65 and 2,132.09 is: 2,942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.45 : 5,382.65 = 2,132.09 : x
  2. Step 2: Convert to fraction form
    3,900.45/5,382.65 = 2,132.09/x
  3. Step 3: Cross multiply
    3,900.45x = 5,382.65 × 2,132.09
  4. Step 4: Simplify right side
    3,900.45x = 11,476,292.84
  5. Step 5: Solve for x
    x = 11,476,292.84/3,900.45
  6. Step 6: Final answer
    x = 2,942.30

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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.