Home / 3,935.78-5,431.19-2,167.06

Finding the Fourth Proportional to 3,935.78, 5,431.19 and 2,167.06

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Solution

The fourth proportional to 3,935.78, 5,431.19 and 2,167.06 is: 2,990.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.78 : 5,431.19 = 2,167.06 : x
  2. Step 2: Convert to fraction form
    3,935.78/5,431.19 = 2,167.06/x
  3. Step 3: Cross multiply
    3,935.78x = 5,431.19 × 2,167.06
  4. Step 4: Simplify right side
    3,935.78x = 11,769,690.19
  5. Step 5: Solve for x
    x = 11,769,690.19/3,935.78
  6. Step 6: Final answer
    x = 2,990.43

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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.