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Finding the Fourth Proportional to 11,992.73, 17,988.95 and 5,414.31

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Solution

The fourth proportional to 11,992.73, 17,988.95 and 5,414.31 is: 8,121.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.73 : 17,988.95 = 5,414.31 : x
  2. Step 2: Convert to fraction form
    11,992.73/17,988.95 = 5,414.31/x
  3. Step 3: Cross multiply
    11,992.73x = 17,988.95 × 5,414.31
  4. Step 4: Simplify right side
    11,992.73x = 97,397,765.41
  5. Step 5: Solve for x
    x = 97,397,765.41/11,992.73
  6. Step 6: Final answer
    x = 8,121.40

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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.