Home / 3,900.88-5,383.08-2,132.56

Finding the Fourth Proportional to 3,900.88, 5,383.08 and 2,132.56

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Solution

The fourth proportional to 3,900.88, 5,383.08 and 2,132.56 is: 2,942.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.88 : 5,383.08 = 2,132.56 : x
  2. Step 2: Convert to fraction form
    3,900.88/5,383.08 = 2,132.56/x
  3. Step 3: Cross multiply
    3,900.88x = 5,383.08 × 2,132.56
  4. Step 4: Simplify right side
    3,900.88x = 11,479,741.08
  5. Step 5: Solve for x
    x = 11,479,741.08/3,900.88
  6. Step 6: Final answer
    x = 2,942.86

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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.