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Finding the Third Proportional to 7,979 and 12,629

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Solution

The third proportional to 7,979 and 12,629 is: 19,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979 : 12,629 = 12,629 : x
  2. Step 2: Convert to fraction form
    7,979/12,629 = 12,629/x
  3. Step 3: Cross multiply
    7,979x = 12,629 × 12,629
  4. Step 4: Simplify right side
    7,979x = 159,491,641
  5. Step 5: Solve for x
    x = 159,491,641/7,979
  6. Step 6: Final answer
    x = 19,988.93

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.