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Finding the Third Proportional to 15,960 and 19,320

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Solution

The third proportional to 15,960 and 19,320 is: 23,387.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,960 : 19,320 = 19,320 : x
  2. Step 2: Convert to fraction form
    15,960/19,320 = 19,320/x
  3. Step 3: Cross multiply
    15,960x = 19,320 × 19,320
  4. Step 4: Simplify right side
    15,960x = 373,262,400
  5. Step 5: Solve for x
    x = 373,262,400/15,960
  6. Step 6: Final answer
    x = 23,387.37

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.