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Finding the Third Proportional to 15,290 and 20,007

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Solution

The third proportional to 15,290 and 20,007 is: 26,179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290 : 20,007 = 20,007 : x
  2. Step 2: Convert to fraction form
    15,290/20,007 = 20,007/x
  3. Step 3: Cross multiply
    15,290x = 20,007 × 20,007
  4. Step 4: Simplify right side
    15,290x = 400,280,049
  5. Step 5: Solve for x
    x = 400,280,049/15,290
  6. Step 6: Final answer
    x = 26,179.21

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.