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Finding the Third Proportional to 21,390.75 and 25,008.75

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Solution

The third proportional to 21,390.75 and 25,008.75 is: 29,238.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.75 : 25,008.75 = 25,008.75 : x
  2. Step 2: Convert to fraction form
    21,390.75/25,008.75 = 25,008.75/x
  3. Step 3: Cross multiply
    21,390.75x = 25,008.75 × 25,008.75
  4. Step 4: Simplify right side
    21,390.75x = 625,437,576.56
  5. Step 5: Solve for x
    x = 625,437,576.56/21,390.75
  6. Step 6: Final answer
    x = 29,238.69

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.