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Finding the Third Proportional to 8,402 and 12,209

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Solution

The third proportional to 8,402 and 12,209 is: 17,740.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,402 : 12,209 = 12,209 : x
  2. Step 2: Convert to fraction form
    8,402/12,209 = 12,209/x
  3. Step 3: Cross multiply
    8,402x = 12,209 × 12,209
  4. Step 4: Simplify right side
    8,402x = 149,059,681
  5. Step 5: Solve for x
    x = 149,059,681/8,402
  6. Step 6: Final answer
    x = 17,740.98

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.