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Finding the Third Proportional to 8,661 and 11,929.50

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Solution

The third proportional to 8,661 and 11,929.50 is: 16,431.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661 : 11,929.50 = 11,929.50 : x
  2. Step 2: Convert to fraction form
    8,661/11,929.50 = 11,929.50/x
  3. Step 3: Cross multiply
    8,661x = 11,929.50 × 11,929.50
  4. Step 4: Simplify right side
    8,661x = 142,312,970.25
  5. Step 5: Solve for x
    x = 142,312,970.25/8,661
  6. Step 6: Final answer
    x = 16,431.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.