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Finding the Third Proportional to 6,991 and 10,918.50

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Solution

The third proportional to 6,991 and 10,918.50 is: 17,052.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991 : 10,918.50 = 10,918.50 : x
  2. Step 2: Convert to fraction form
    6,991/10,918.50 = 10,918.50/x
  3. Step 3: Cross multiply
    6,991x = 10,918.50 × 10,918.50
  4. Step 4: Simplify right side
    6,991x = 119,213,642.25
  5. Step 5: Solve for x
    x = 119,213,642.25/6,991
  6. Step 6: Final answer
    x = 17,052.44

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.