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Finding the Third Proportional to 13,128 and 19,816

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Solution

The third proportional to 13,128 and 19,816 is: 29,911.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128 : 19,816 = 19,816 : x
  2. Step 2: Convert to fraction form
    13,128/19,816 = 19,816/x
  3. Step 3: Cross multiply
    13,128x = 19,816 × 19,816
  4. Step 4: Simplify right side
    13,128x = 392,673,856
  5. Step 5: Solve for x
    x = 392,673,856/13,128
  6. Step 6: Final answer
    x = 29,911.17

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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.