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Finding the Fourth Proportional to 18,481.26, 27,712.16 and 9,120.90

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Solution

The fourth proportional to 18,481.26, 27,712.16 and 9,120.90 is: 13,676.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.26 : 27,712.16 = 9,120.90 : x
  2. Step 2: Convert to fraction form
    18,481.26/27,712.16 = 9,120.90/x
  3. Step 3: Cross multiply
    18,481.26x = 27,712.16 × 9,120.90
  4. Step 4: Simplify right side
    18,481.26x = 252,759,840.14
  5. Step 5: Solve for x
    x = 252,759,840.14/18,481.26
  6. Step 6: Final answer
    x = 13,676.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.