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Finding the Third Proportional to 7,209 and 10,813

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Solution

The third proportional to 7,209 and 10,813 is: 16,218.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209 : 10,813 = 10,813 : x
  2. Step 2: Convert to fraction form
    7,209/10,813 = 10,813/x
  3. Step 3: Cross multiply
    7,209x = 10,813 × 10,813
  4. Step 4: Simplify right side
    7,209x = 116,920,969
  5. Step 5: Solve for x
    x = 116,920,969/7,209
  6. Step 6: Final answer
    x = 16,218.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.