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Finding the Fourth Proportional to 8,919.57, 13,375.90 and 2,678.11

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Solution

The fourth proportional to 8,919.57, 13,375.90 and 2,678.11 is: 4,016.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.57 : 13,375.90 = 2,678.11 : x
  2. Step 2: Convert to fraction form
    8,919.57/13,375.90 = 2,678.11/x
  3. Step 3: Cross multiply
    8,919.57x = 13,375.90 × 2,678.11
  4. Step 4: Simplify right side
    8,919.57x = 35,822,131.55
  5. Step 5: Solve for x
    x = 35,822,131.55/8,919.57
  6. Step 6: Final answer
    x = 4,016.13

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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.