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Finding the Third Proportional to 19,416 and 40,680

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Solution

The third proportional to 19,416 and 40,680 is: 85,231.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,416 : 40,680 = 40,680 : x
  2. Step 2: Convert to fraction form
    19,416/40,680 = 40,680/x
  3. Step 3: Cross multiply
    19,416x = 40,680 × 40,680
  4. Step 4: Simplify right side
    19,416x = 1,654,862,400
  5. Step 5: Solve for x
    x = 1,654,862,400/19,416
  6. Step 6: Final answer
    x = 85,231.89

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.