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Finding the Third Proportional to 10,690 and 15,000

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Solution

The third proportional to 10,690 and 15,000 is: 21,047.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,690 : 15,000 = 15,000 : x
  2. Step 2: Convert to fraction form
    10,690/15,000 = 15,000/x
  3. Step 3: Cross multiply
    10,690x = 15,000 × 15,000
  4. Step 4: Simplify right side
    10,690x = 225,000,000
  5. Step 5: Solve for x
    x = 225,000,000/10,690
  6. Step 6: Final answer
    x = 21,047.71

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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.