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Finding the Fourth Proportional to 8,917.72, 13,376.04 and 3,074.20

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Solution

The fourth proportional to 8,917.72, 13,376.04 and 3,074.20 is: 4,611.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.72 : 13,376.04 = 3,074.20 : x
  2. Step 2: Convert to fraction form
    8,917.72/13,376.04 = 3,074.20/x
  3. Step 3: Cross multiply
    8,917.72x = 13,376.04 × 3,074.20
  4. Step 4: Simplify right side
    8,917.72x = 41,120,622.17
  5. Step 5: Solve for x
    x = 41,120,622.17/8,917.72
  6. Step 6: Final answer
    x = 4,611.11

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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.