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Finding the Third Proportional to 15,129.75 and 21,167.25

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Solution

The third proportional to 15,129.75 and 21,167.25 is: 29,614.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.75 : 21,167.25 = 21,167.25 : x
  2. Step 2: Convert to fraction form
    15,129.75/21,167.25 = 21,167.25/x
  3. Step 3: Cross multiply
    15,129.75x = 21,167.25 × 21,167.25
  4. Step 4: Simplify right side
    15,129.75x = 448,052,472.56
  5. Step 5: Solve for x
    x = 448,052,472.56/15,129.75
  6. Step 6: Final answer
    x = 29,614.00

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.