Home / 3,936.08-5,431.78-2,167.72

Finding the Fourth Proportional to 3,936.08, 5,431.78 and 2,167.72

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Solution

The fourth proportional to 3,936.08, 5,431.78 and 2,167.72 is: 2,991.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.08 : 5,431.78 = 2,167.72 : x
  2. Step 2: Convert to fraction form
    3,936.08/5,431.78 = 2,167.72/x
  3. Step 3: Cross multiply
    3,936.08x = 5,431.78 × 2,167.72
  4. Step 4: Simplify right side
    3,936.08x = 11,774,578.14
  5. Step 5: Solve for x
    x = 11,774,578.14/3,936.08
  6. Step 6: Final answer
    x = 2,991.45

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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.