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Finding the Third Proportional to 9,000 and 13,580

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Solution

The third proportional to 9,000 and 13,580 is: 20,490.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,000 : 13,580 = 13,580 : x
  2. Step 2: Convert to fraction form
    9,000/13,580 = 13,580/x
  3. Step 3: Cross multiply
    9,000x = 13,580 × 13,580
  4. Step 4: Simplify right side
    9,000x = 184,416,400
  5. Step 5: Solve for x
    x = 184,416,400/9,000
  6. Step 6: Final answer
    x = 20,490.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.