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Finding the Fourth Proportional to 18,579.72, 27,873.24 and 8,191.56

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Solution

The fourth proportional to 18,579.72, 27,873.24 and 8,191.56 is: 12,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579.72 : 27,873.24 = 8,191.56 : x
  2. Step 2: Convert to fraction form
    18,579.72/27,873.24 = 8,191.56/x
  3. Step 3: Cross multiply
    18,579.72x = 27,873.24 × 8,191.56
  4. Step 4: Simplify right side
    18,579.72x = 228,325,317.85
  5. Step 5: Solve for x
    x = 228,325,317.85/18,579.72
  6. Step 6: Final answer
    x = 12,288.95

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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.