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Finding the Fourth Proportional to 18,107.68, 27,170.88 and 7,716.64

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Solution

The fourth proportional to 18,107.68, 27,170.88 and 7,716.64 is: 11,578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,107.68 : 27,170.88 = 7,716.64 : x
  2. Step 2: Convert to fraction form
    18,107.68/27,170.88 = 7,716.64/x
  3. Step 3: Cross multiply
    18,107.68x = 27,170.88 × 7,716.64
  4. Step 4: Simplify right side
    18,107.68x = 209,667,899.44
  5. Step 5: Solve for x
    x = 209,667,899.44/18,107.68
  6. Step 6: Final answer
    x = 11,578.95

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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.