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Finding the Third Proportional to 15,900.75 and 18,168.75

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Solution

The third proportional to 15,900.75 and 18,168.75 is: 20,760.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.75 : 18,168.75 = 18,168.75 : x
  2. Step 2: Convert to fraction form
    15,900.75/18,168.75 = 18,168.75/x
  3. Step 3: Cross multiply
    15,900.75x = 18,168.75 × 18,168.75
  4. Step 4: Simplify right side
    15,900.75x = 330,103,476.56
  5. Step 5: Solve for x
    x = 330,103,476.56/15,900.75
  6. Step 6: Final answer
    x = 20,760.25

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.