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Finding the Fourth Proportional to 8,919.64, 13,379.61 and 3,375.59

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Solution

The fourth proportional to 8,919.64, 13,379.61 and 3,375.59 is: 5,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.64 : 13,379.61 = 3,375.59 : x
  2. Step 2: Convert to fraction form
    8,919.64/13,379.61 = 3,375.59/x
  3. Step 3: Cross multiply
    8,919.64x = 13,379.61 × 3,375.59
  4. Step 4: Simplify right side
    8,919.64x = 45,164,098.74
  5. Step 5: Solve for x
    x = 45,164,098.74/8,919.64
  6. Step 6: Final answer
    x = 5,063.45

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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.