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Finding the Fourth Proportional to 18,078.12, 27,119.88 and 8,217.18

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Solution

The fourth proportional to 18,078.12, 27,119.88 and 8,217.18 is: 12,327.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.12 : 27,119.88 = 8,217.18 : x
  2. Step 2: Convert to fraction form
    18,078.12/27,119.88 = 8,217.18/x
  3. Step 3: Cross multiply
    18,078.12x = 27,119.88 × 8,217.18
  4. Step 4: Simplify right side
    18,078.12x = 222,848,935.54
  5. Step 5: Solve for x
    x = 222,848,935.54/18,078.12
  6. Step 6: Final answer
    x = 12,327.00

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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.