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Finding the Third Proportional to 7,079.25 and 9,921.75

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Solution

The third proportional to 7,079.25 and 9,921.75 is: 13,905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,079.25 : 9,921.75 = 9,921.75 : x
  2. Step 2: Convert to fraction form
    7,079.25/9,921.75 = 9,921.75/x
  3. Step 3: Cross multiply
    7,079.25x = 9,921.75 × 9,921.75
  4. Step 4: Simplify right side
    7,079.25x = 98,441,123.06
  5. Step 5: Solve for x
    x = 98,441,123.06/7,079.25
  6. Step 6: Final answer
    x = 13,905.59

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.