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Finding the Third Proportional to 13,510 and 20,455

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Solution

The third proportional to 13,510 and 20,455 is: 30,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510 : 20,455 = 20,455 : x
  2. Step 2: Convert to fraction form
    13,510/20,455 = 20,455/x
  3. Step 3: Cross multiply
    13,510x = 20,455 × 20,455
  4. Step 4: Simplify right side
    13,510x = 418,407,025
  5. Step 5: Solve for x
    x = 418,407,025/13,510
  6. Step 6: Final answer
    x = 30,970.17

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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.