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Finding the Fourth Proportional to 8,880.64, 13,321.67 and 2,640.55

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Solution

The fourth proportional to 8,880.64, 13,321.67 and 2,640.55 is: 3,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,880.64 : 13,321.67 = 2,640.55 : x
  2. Step 2: Convert to fraction form
    8,880.64/13,321.67 = 2,640.55/x
  3. Step 3: Cross multiply
    8,880.64x = 13,321.67 × 2,640.55
  4. Step 4: Simplify right side
    8,880.64x = 35,176,514.19
  5. Step 5: Solve for x
    x = 35,176,514.19/8,880.64
  6. Step 6: Final answer
    x = 3,961.03

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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.