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Finding the Third Proportional to 4,666.78 and 7,122.09

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Solution

The third proportional to 4,666.78 and 7,122.09 is: 10,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,666.78 : 7,122.09 = 7,122.09 : x
  2. Step 2: Convert to fraction form
    4,666.78/7,122.09 = 7,122.09/x
  3. Step 3: Cross multiply
    4,666.78x = 7,122.09 × 7,122.09
  4. Step 4: Simplify right side
    4,666.78x = 50,724,219.38
  5. Step 5: Solve for x
    x = 50,724,219.38/4,666.78
  6. Step 6: Final answer
    x = 10,869.21

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.