Home / 3,932.81-5,427.31-2,164.45

Finding the Fourth Proportional to 3,932.81, 5,427.31 and 2,164.45

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Solution

The fourth proportional to 3,932.81, 5,427.31 and 2,164.45 is: 2,986.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,932.81 : 5,427.31 = 2,164.45 : x
  2. Step 2: Convert to fraction form
    3,932.81/5,427.31 = 2,164.45/x
  3. Step 3: Cross multiply
    3,932.81x = 5,427.31 × 2,164.45
  4. Step 4: Simplify right side
    3,932.81x = 11,747,141.13
  5. Step 5: Solve for x
    x = 11,747,141.13/3,932.81
  6. Step 6: Final answer
    x = 2,986.96

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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.