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Finding the Third Proportional to 2,709 and 5,136.75

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Solution

The third proportional to 2,709 and 5,136.75 is: 9,740.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709 : 5,136.75 = 5,136.75 : x
  2. Step 2: Convert to fraction form
    2,709/5,136.75 = 5,136.75/x
  3. Step 3: Cross multiply
    2,709x = 5,136.75 × 5,136.75
  4. Step 4: Simplify right side
    2,709x = 26,386,200.56
  5. Step 5: Solve for x
    x = 26,386,200.56/2,709
  6. Step 6: Final answer
    x = 9,740.20

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.