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Finding the Fourth Proportional to 13,409.82, 18,505.55 and 8,694.09

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Solution

The fourth proportional to 13,409.82, 18,505.55 and 8,694.09 is: 11,997.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.82 : 18,505.55 = 8,694.09 : x
  2. Step 2: Convert to fraction form
    13,409.82/18,505.55 = 8,694.09/x
  3. Step 3: Cross multiply
    13,409.82x = 18,505.55 × 8,694.09
  4. Step 4: Simplify right side
    13,409.82x = 160,888,873.73
  5. Step 5: Solve for x
    x = 160,888,873.73/13,409.82
  6. Step 6: Final answer
    x = 11,997.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.