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Finding the Fourth Proportional to 12,645.92, 18,958.62 and 11,261.95

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Solution

The fourth proportional to 12,645.92, 18,958.62 and 11,261.95 is: 16,883.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.92 : 18,958.62 = 11,261.95 : x
  2. Step 2: Convert to fraction form
    12,645.92/18,958.62 = 11,261.95/x
  3. Step 3: Cross multiply
    12,645.92x = 18,958.62 × 11,261.95
  4. Step 4: Simplify right side
    12,645.92x = 213,511,025.34
  5. Step 5: Solve for x
    x = 213,511,025.34/12,645.92
  6. Step 6: Final answer
    x = 16,883.78

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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.