Home / 13,611.38-18,786.94-8,310.67

Finding the Fourth Proportional to 13,611.38, 18,786.94 and 8,310.67

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Solution

The fourth proportional to 13,611.38, 18,786.94 and 8,310.67 is: 11,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.38 : 18,786.94 = 8,310.67 : x
  2. Step 2: Convert to fraction form
    13,611.38/18,786.94 = 8,310.67/x
  3. Step 3: Cross multiply
    13,611.38x = 18,786.94 × 8,310.67
  4. Step 4: Simplify right side
    13,611.38x = 156,131,990.91
  5. Step 5: Solve for x
    x = 156,131,990.91/13,611.38
  6. Step 6: Final answer
    x = 11,470.70

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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.