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Finding the Third Proportional to 10,800 and 15,480

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Solution

The third proportional to 10,800 and 15,480 is: 22,188

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,800 : 15,480 = 15,480 : x
  2. Step 2: Convert to fraction form
    10,800/15,480 = 15,480/x
  3. Step 3: Cross multiply
    10,800x = 15,480 × 15,480
  4. Step 4: Simplify right side
    10,800x = 239,630,400
  5. Step 5: Solve for x
    x = 239,630,400/10,800
  6. Step 6: Final answer
    x = 22,188

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.