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Finding the Third Proportional to 13,120 and 19,680

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Solution

The third proportional to 13,120 and 19,680 is: 29,520

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120 : 19,680 = 19,680 : x
  2. Step 2: Convert to fraction form
    13,120/19,680 = 19,680/x
  3. Step 3: Cross multiply
    13,120x = 19,680 × 19,680
  4. Step 4: Simplify right side
    13,120x = 387,302,400
  5. Step 5: Solve for x
    x = 387,302,400/13,120
  6. Step 6: Final answer
    x = 29,520

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.