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Finding the Fourth Proportional to 19,986, 29,979 and 5,394

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Solution

The fourth proportional to 19,986, 29,979 and 5,394 is: 8,091

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986 : 29,979 = 5,394 : x
  2. Step 2: Convert to fraction form
    19,986/29,979 = 5,394/x
  3. Step 3: Cross multiply
    19,986x = 29,979 × 5,394
  4. Step 4: Simplify right side
    19,986x = 161,706,726
  5. Step 5: Solve for x
    x = 161,706,726/19,986
  6. Step 6: Final answer
    x = 8,091

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.