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Finding the Third Proportional to 15,720 and 17,304

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Solution

The third proportional to 15,720 and 17,304 is: 19,047.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720 : 17,304 = 17,304 : x
  2. Step 2: Convert to fraction form
    15,720/17,304 = 17,304/x
  3. Step 3: Cross multiply
    15,720x = 17,304 × 17,304
  4. Step 4: Simplify right side
    15,720x = 299,428,416
  5. Step 5: Solve for x
    x = 299,428,416/15,720
  6. Step 6: Final answer
    x = 19,047.61

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.