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Finding the Fourth Proportional to 11,989.15, 17,992.91 and 8,471.59

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Solution

The fourth proportional to 11,989.15, 17,992.91 and 8,471.59 is: 12,713.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,989.15 : 17,992.91 = 8,471.59 : x
  2. Step 2: Convert to fraction form
    11,989.15/17,992.91 = 8,471.59/x
  3. Step 3: Cross multiply
    11,989.15x = 17,992.91 × 8,471.59
  4. Step 4: Simplify right side
    11,989.15x = 152,428,556.43
  5. Step 5: Solve for x
    x = 152,428,556.43/11,989.15
  6. Step 6: Final answer
    x = 12,713.88

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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.