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Finding the Fourth Proportional to 15,169.73, 20,933.64 and 8,455.19

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Solution

The fourth proportional to 15,169.73, 20,933.64 and 8,455.19 is: 11,667.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,169.73 : 20,933.64 = 8,455.19 : x
  2. Step 2: Convert to fraction form
    15,169.73/20,933.64 = 8,455.19/x
  3. Step 3: Cross multiply
    15,169.73x = 20,933.64 × 8,455.19
  4. Step 4: Simplify right side
    15,169.73x = 176,997,798.92
  5. Step 5: Solve for x
    x = 176,997,798.92/15,169.73
  6. Step 6: Final answer
    x = 11,667.83

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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.