Home / 3,936.39-5,428.98-2,872.96

Finding the Fourth Proportional to 3,936.39, 5,428.98 and 2,872.96

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Solution

The fourth proportional to 3,936.39, 5,428.98 and 2,872.96 is: 3,962.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.39 : 5,428.98 = 2,872.96 : x
  2. Step 2: Convert to fraction form
    3,936.39/5,428.98 = 2,872.96/x
  3. Step 3: Cross multiply
    3,936.39x = 5,428.98 × 2,872.96
  4. Step 4: Simplify right side
    3,936.39x = 15,597,215.24
  5. Step 5: Solve for x
    x = 15,597,215.24/3,936.39
  6. Step 6: Final answer
    x = 3,962.32

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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.