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Finding the Fourth Proportional to 11,969.85, 17,958.60 and 3,651.48

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Solution

The fourth proportional to 11,969.85, 17,958.60 and 3,651.48 is: 5,478.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,969.85 : 17,958.60 = 3,651.48 : x
  2. Step 2: Convert to fraction form
    11,969.85/17,958.60 = 3,651.48/x
  3. Step 3: Cross multiply
    11,969.85x = 17,958.60 × 3,651.48
  4. Step 4: Simplify right side
    11,969.85x = 65,575,468.73
  5. Step 5: Solve for x
    x = 65,575,468.73/11,969.85
  6. Step 6: Final answer
    x = 5,478.39

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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.