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Finding the Fourth Proportional to 18,481.58, 25,505.63 and 11,408.12

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Solution

The fourth proportional to 18,481.58, 25,505.63 and 11,408.12 is: 15,743.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.58 : 25,505.63 = 11,408.12 : x
  2. Step 2: Convert to fraction form
    18,481.58/25,505.63 = 11,408.12/x
  3. Step 3: Cross multiply
    18,481.58x = 25,505.63 × 11,408.12
  4. Step 4: Simplify right side
    18,481.58x = 290,971,287.72
  5. Step 5: Solve for x
    x = 290,971,287.72/18,481.58
  6. Step 6: Final answer
    x = 15,743.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.