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Finding the Third Proportional to 21,960 and 32,880

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Solution

The third proportional to 21,960 and 32,880 is: 49,230.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960 : 32,880 = 32,880 : x
  2. Step 2: Convert to fraction form
    21,960/32,880 = 32,880/x
  3. Step 3: Cross multiply
    21,960x = 32,880 × 32,880
  4. Step 4: Simplify right side
    21,960x = 1,081,094,400
  5. Step 5: Solve for x
    x = 1,081,094,400/21,960
  6. Step 6: Final answer
    x = 49,230.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.