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Finding the Third Proportional to 3,240 and 7,089

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Solution

The third proportional to 3,240 and 7,089 is: 15,510.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240 : 7,089 = 7,089 : x
  2. Step 2: Convert to fraction form
    3,240/7,089 = 7,089/x
  3. Step 3: Cross multiply
    3,240x = 7,089 × 7,089
  4. Step 4: Simplify right side
    3,240x = 50,253,921
  5. Step 5: Solve for x
    x = 50,253,921/3,240
  6. Step 6: Final answer
    x = 15,510.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.