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Finding the Fourth Proportional to 18,311.70, 27,469.98 and 8,453.19

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Solution

The fourth proportional to 18,311.70, 27,469.98 and 8,453.19 is: 12,680.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.70 : 27,469.98 = 8,453.19 : x
  2. Step 2: Convert to fraction form
    18,311.70/27,469.98 = 8,453.19/x
  3. Step 3: Cross multiply
    18,311.70x = 27,469.98 × 8,453.19
  4. Step 4: Simplify right side
    18,311.70x = 232,208,960.24
  5. Step 5: Solve for x
    x = 232,208,960.24/18,311.70
  6. Step 6: Final answer
    x = 12,680.91

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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.