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Finding the Third Proportional to 8,407 and 12,716.50

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Solution

The third proportional to 8,407 and 12,716.50 is: 19,235.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407 : 12,716.50 = 12,716.50 : x
  2. Step 2: Convert to fraction form
    8,407/12,716.50 = 12,716.50/x
  3. Step 3: Cross multiply
    8,407x = 12,716.50 × 12,716.50
  4. Step 4: Simplify right side
    8,407x = 161,709,372.25
  5. Step 5: Solve for x
    x = 161,709,372.25/8,407
  6. Step 6: Final answer
    x = 19,235.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.