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Finding the Third Proportional to 10,779 and 12,480

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Solution

The third proportional to 10,779 and 12,480 is: 14,449.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779 : 12,480 = 12,480 : x
  2. Step 2: Convert to fraction form
    10,779/12,480 = 12,480/x
  3. Step 3: Cross multiply
    10,779x = 12,480 × 12,480
  4. Step 4: Simplify right side
    10,779x = 155,750,400
  5. Step 5: Solve for x
    x = 155,750,400/10,779
  6. Step 6: Final answer
    x = 14,449.43

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.