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Finding the Third Proportional to 9,391 and 13,129

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Solution

The third proportional to 9,391 and 13,129 is: 18,354.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,391 : 13,129 = 13,129 : x
  2. Step 2: Convert to fraction form
    9,391/13,129 = 13,129/x
  3. Step 3: Cross multiply
    9,391x = 13,129 × 13,129
  4. Step 4: Simplify right side
    9,391x = 172,370,641
  5. Step 5: Solve for x
    x = 172,370,641/9,391
  6. Step 6: Final answer
    x = 18,354.88

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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.