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Finding the Fourth Proportional to 8,836.64, 13,247.04 and 3,639.20

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Solution

The fourth proportional to 8,836.64, 13,247.04 and 3,639.20 is: 5,455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,836.64 : 13,247.04 = 3,639.20 : x
  2. Step 2: Convert to fraction form
    8,836.64/13,247.04 = 3,639.20/x
  3. Step 3: Cross multiply
    8,836.64x = 13,247.04 × 3,639.20
  4. Step 4: Simplify right side
    8,836.64x = 48,208,627.97
  5. Step 5: Solve for x
    x = 48,208,627.97/8,836.64
  6. Step 6: Final answer
    x = 5,455.54

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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.