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Finding the Fourth Proportional to 11,791.96, 17,649.48 and 8,671.12

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Solution

The fourth proportional to 11,791.96, 17,649.48 and 8,671.12 is: 12,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,791.96 : 17,649.48 = 8,671.12 : x
  2. Step 2: Convert to fraction form
    11,791.96/17,649.48 = 8,671.12/x
  3. Step 3: Cross multiply
    11,791.96x = 17,649.48 × 8,671.12
  4. Step 4: Simplify right side
    11,791.96x = 153,040,759.02
  5. Step 5: Solve for x
    x = 153,040,759.02/11,791.96
  6. Step 6: Final answer
    x = 12,978.40

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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.