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Finding the Third Proportional to 6,438.75 and 14,107.50

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Solution

The third proportional to 6,438.75 and 14,107.50 is: 30,909.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.75 : 14,107.50 = 14,107.50 : x
  2. Step 2: Convert to fraction form
    6,438.75/14,107.50 = 14,107.50/x
  3. Step 3: Cross multiply
    6,438.75x = 14,107.50 × 14,107.50
  4. Step 4: Simplify right side
    6,438.75x = 199,021,556.25
  5. Step 5: Solve for x
    x = 199,021,556.25/6,438.75
  6. Step 6: Final answer
    x = 30,909.97

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.