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Finding the Fourth Proportional to 11,790.58, 17,686.42 and 3,893.78

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Solution

The fourth proportional to 11,790.58, 17,686.42 and 3,893.78 is: 5,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,790.58 : 17,686.42 = 3,893.78 : x
  2. Step 2: Convert to fraction form
    11,790.58/17,686.42 = 3,893.78/x
  3. Step 3: Cross multiply
    11,790.58x = 17,686.42 × 3,893.78
  4. Step 4: Simplify right side
    11,790.58x = 68,867,028.47
  5. Step 5: Solve for x
    x = 68,867,028.47/11,790.58
  6. Step 6: Final answer
    x = 5,840.85

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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.