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Finding the Third Proportional to 18,360 and 21,600

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Solution

The third proportional to 18,360 and 21,600 is: 25,411.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,360 : 21,600 = 21,600 : x
  2. Step 2: Convert to fraction form
    18,360/21,600 = 21,600/x
  3. Step 3: Cross multiply
    18,360x = 21,600 × 21,600
  4. Step 4: Simplify right side
    18,360x = 466,560,000
  5. Step 5: Solve for x
    x = 466,560,000/18,360
  6. Step 6: Final answer
    x = 25,411.76

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.