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Finding the Fourth Proportional to 9,986, 14,979 and 2,690

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Solution

The fourth proportional to 9,986, 14,979 and 2,690 is: 4,035

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986 : 14,979 = 2,690 : x
  2. Step 2: Convert to fraction form
    9,986/14,979 = 2,690/x
  3. Step 3: Cross multiply
    9,986x = 14,979 × 2,690
  4. Step 4: Simplify right side
    9,986x = 40,293,510
  5. Step 5: Solve for x
    x = 40,293,510/9,986
  6. Step 6: Final answer
    x = 4,035

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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.