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Finding the Fourth Proportional to 15,169.97, 20,933.98 and 8,455.27

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Solution

The fourth proportional to 15,169.97, 20,933.98 and 8,455.27 is: 11,667.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.97 : 20,933.98 = 8,455.27 : x
  2. Step 2: Convert to fraction form
    15,169.97/20,933.98 = 8,455.27/x
  3. Step 3: Cross multiply
    15,169.97x = 20,933.98 × 8,455.27
  4. Step 4: Simplify right side
    15,169.97x = 177,002,453.07
  5. Step 5: Solve for x
    x = 177,002,453.07/15,169.97
  6. Step 6: Final answer
    x = 11,667.95

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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.