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Finding the Third Proportional to 7,089.75 and 9,911.25

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Solution

The third proportional to 7,089.75 and 9,911.25 is: 13,855.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,089.75 : 9,911.25 = 9,911.25 : x
  2. Step 2: Convert to fraction form
    7,089.75/9,911.25 = 9,911.25/x
  3. Step 3: Cross multiply
    7,089.75x = 9,911.25 × 9,911.25
  4. Step 4: Simplify right side
    7,089.75x = 98,232,876.56
  5. Step 5: Solve for x
    x = 98,232,876.56/7,089.75
  6. Step 6: Final answer
    x = 13,855.62

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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.