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Finding the Third Proportional to 13,309 and 19,531

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Solution

The third proportional to 13,309 and 19,531 is: 28,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,309 : 19,531 = 19,531 : x
  2. Step 2: Convert to fraction form
    13,309/19,531 = 19,531/x
  3. Step 3: Cross multiply
    13,309x = 19,531 × 19,531
  4. Step 4: Simplify right side
    13,309x = 381,459,961
  5. Step 5: Solve for x
    x = 381,459,961/13,309
  6. Step 6: Final answer
    x = 28,661.80

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.