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Finding the Third Proportional to 12,929 and 20,505.50

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Solution

The third proportional to 12,929 and 20,505.50 is: 32,521.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929 : 20,505.50 = 20,505.50 : x
  2. Step 2: Convert to fraction form
    12,929/20,505.50 = 20,505.50/x
  3. Step 3: Cross multiply
    12,929x = 20,505.50 × 20,505.50
  4. Step 4: Simplify right side
    12,929x = 420,475,530.25
  5. Step 5: Solve for x
    x = 420,475,530.25/12,929
  6. Step 6: Final answer
    x = 32,521.89

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.