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Finding the Third Proportional to 9,879 and 12,829.50

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Solution

The third proportional to 9,879 and 12,829.50 is: 16,661.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879 : 12,829.50 = 12,829.50 : x
  2. Step 2: Convert to fraction form
    9,879/12,829.50 = 12,829.50/x
  3. Step 3: Cross multiply
    9,879x = 12,829.50 × 12,829.50
  4. Step 4: Simplify right side
    9,879x = 164,596,070.25
  5. Step 5: Solve for x
    x = 164,596,070.25/9,879
  6. Step 6: Final answer
    x = 16,661.21

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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.