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Finding the Third Proportional to 7,972.50 and 11,683.50

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Solution

The third proportional to 7,972.50 and 11,683.50 is: 17,121.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.50 : 11,683.50 = 11,683.50 : x
  2. Step 2: Convert to fraction form
    7,972.50/11,683.50 = 11,683.50/x
  3. Step 3: Cross multiply
    7,972.50x = 11,683.50 × 11,683.50
  4. Step 4: Simplify right side
    7,972.50x = 136,504,172.25
  5. Step 5: Solve for x
    x = 136,504,172.25/7,972.50
  6. Step 6: Final answer
    x = 17,121.88

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.