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Finding the Third Proportional to 8,779 and 11,389

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Solution

The third proportional to 8,779 and 11,389 is: 14,774.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779 : 11,389 = 11,389 : x
  2. Step 2: Convert to fraction form
    8,779/11,389 = 11,389/x
  3. Step 3: Cross multiply
    8,779x = 11,389 × 11,389
  4. Step 4: Simplify right side
    8,779x = 129,709,321
  5. Step 5: Solve for x
    x = 129,709,321/8,779
  6. Step 6: Final answer
    x = 14,774.95

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.