Home / 3,921.31-5,408.57-2,661.96

Finding the Fourth Proportional to 3,921.31, 5,408.57 and 2,661.96

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Solution

The fourth proportional to 3,921.31, 5,408.57 and 2,661.96 is: 3,671.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.31 : 5,408.57 = 2,661.96 : x
  2. Step 2: Convert to fraction form
    3,921.31/5,408.57 = 2,661.96/x
  3. Step 3: Cross multiply
    3,921.31x = 5,408.57 × 2,661.96
  4. Step 4: Simplify right side
    3,921.31x = 14,397,423.93
  5. Step 5: Solve for x
    x = 14,397,423.93/3,921.31
  6. Step 6: Final answer
    x = 3,671.58

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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.