Home / 3,936.14-5,428.64-2,872.71

Finding the Fourth Proportional to 3,936.14, 5,428.64 and 2,872.71

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Solution

The fourth proportional to 3,936.14, 5,428.64 and 2,872.71 is: 3,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.14 : 5,428.64 = 2,872.71 : x
  2. Step 2: Convert to fraction form
    3,936.14/5,428.64 = 2,872.71/x
  3. Step 3: Cross multiply
    3,936.14x = 5,428.64 × 2,872.71
  4. Step 4: Simplify right side
    3,936.14x = 15,594,866.91
  5. Step 5: Solve for x
    x = 15,594,866.91/3,936.14
  6. Step 6: Final answer
    x = 3,961.97

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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.