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Finding the Fourth Proportional to 8,921.33, 13,379.16 and 8,338.94

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Solution

The fourth proportional to 8,921.33, 13,379.16 and 8,338.94 is: 12,505.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.33 : 13,379.16 = 8,338.94 : x
  2. Step 2: Convert to fraction form
    8,921.33/13,379.16 = 8,338.94/x
  3. Step 3: Cross multiply
    8,921.33x = 13,379.16 × 8,338.94
  4. Step 4: Simplify right side
    8,921.33x = 111,568,012.49
  5. Step 5: Solve for x
    x = 111,568,012.49/8,921.33
  6. Step 6: Final answer
    x = 12,505.76

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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.