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Finding the Third Proportional to 8,520 and 15,360

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Solution

The third proportional to 8,520 and 15,360 is: 27,691.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520 : 15,360 = 15,360 : x
  2. Step 2: Convert to fraction form
    8,520/15,360 = 15,360/x
  3. Step 3: Cross multiply
    8,520x = 15,360 × 15,360
  4. Step 4: Simplify right side
    8,520x = 235,929,600
  5. Step 5: Solve for x
    x = 235,929,600/8,520
  6. Step 6: Final answer
    x = 27,691.27

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.