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Finding the Third Proportional to 5,451 and 13,128

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Solution

The third proportional to 5,451 and 13,128 is: 31,617.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451 : 13,128 = 13,128 : x
  2. Step 2: Convert to fraction form
    5,451/13,128 = 13,128/x
  3. Step 3: Cross multiply
    5,451x = 13,128 × 13,128
  4. Step 4: Simplify right side
    5,451x = 172,344,384
  5. Step 5: Solve for x
    x = 172,344,384/5,451
  6. Step 6: Final answer
    x = 31,617.02

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.