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Finding the Fourth Proportional to 8,917.32, 13,396.49 and 6,290.87

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Solution

The fourth proportional to 8,917.32, 13,396.49 and 6,290.87 is: 9,450.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.32 : 13,396.49 = 6,290.87 : x
  2. Step 2: Convert to fraction form
    8,917.32/13,396.49 = 6,290.87/x
  3. Step 3: Cross multiply
    8,917.32x = 13,396.49 × 6,290.87
  4. Step 4: Simplify right side
    8,917.32x = 84,275,577.05
  5. Step 5: Solve for x
    x = 84,275,577.05/8,917.32
  6. Step 6: Final answer
    x = 9,450.77

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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.