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Finding the Third Proportional to 8,705 and 9,988

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Solution

The third proportional to 8,705 and 9,988 is: 11,460.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705 : 9,988 = 9,988 : x
  2. Step 2: Convert to fraction form
    8,705/9,988 = 9,988/x
  3. Step 3: Cross multiply
    8,705x = 9,988 × 9,988
  4. Step 4: Simplify right side
    8,705x = 99,760,144
  5. Step 5: Solve for x
    x = 99,760,144/8,705
  6. Step 6: Final answer
    x = 11,460.10

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.