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Finding the Third Proportional to 6,439.50 and 13,668.75

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Solution

The third proportional to 6,439.50 and 13,668.75 is: 29,013.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.50 : 13,668.75 = 13,668.75 : x
  2. Step 2: Convert to fraction form
    6,439.50/13,668.75 = 13,668.75/x
  3. Step 3: Cross multiply
    6,439.50x = 13,668.75 × 13,668.75
  4. Step 4: Simplify right side
    6,439.50x = 186,834,726.56
  5. Step 5: Solve for x
    x = 186,834,726.56/6,439.50
  6. Step 6: Final answer
    x = 29,013.86

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.