Home / 3,899.25-5,380.92-2,130.84

Finding the Fourth Proportional to 3,899.25, 5,380.92 and 2,130.84

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Solution

The fourth proportional to 3,899.25, 5,380.92 and 2,130.84 is: 2,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.25 : 5,380.92 = 2,130.84 : x
  2. Step 2: Convert to fraction form
    3,899.25/5,380.92 = 2,130.84/x
  3. Step 3: Cross multiply
    3,899.25x = 5,380.92 × 2,130.84
  4. Step 4: Simplify right side
    3,899.25x = 11,465,879.57
  5. Step 5: Solve for x
    x = 11,465,879.57/3,899.25
  6. Step 6: Final answer
    x = 2,940.53

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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.