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Finding the Fourth Proportional to 18,623.79, 27,919.96 and 8,085.87

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Solution

The fourth proportional to 18,623.79, 27,919.96 and 8,085.87 is: 12,121.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,623.79 : 27,919.96 = 8,085.87 : x
  2. Step 2: Convert to fraction form
    18,623.79/27,919.96 = 8,085.87/x
  3. Step 3: Cross multiply
    18,623.79x = 27,919.96 × 8,085.87
  4. Step 4: Simplify right side
    18,623.79x = 225,757,146.75
  5. Step 5: Solve for x
    x = 225,757,146.75/18,623.79
  6. Step 6: Final answer
    x = 12,121.98

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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.