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Finding the Third Proportional to 6,905 and 9,889

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Solution

The third proportional to 6,905 and 9,889 is: 14,162.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,905 : 9,889 = 9,889 : x
  2. Step 2: Convert to fraction form
    6,905/9,889 = 9,889/x
  3. Step 3: Cross multiply
    6,905x = 9,889 × 9,889
  4. Step 4: Simplify right side
    6,905x = 97,792,321
  5. Step 5: Solve for x
    x = 97,792,321/6,905
  6. Step 6: Final answer
    x = 14,162.54

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.