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Finding the Fourth Proportional to 8,608.64, 12,909.84 and 3,678.62

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Solution

The fourth proportional to 8,608.64, 12,909.84 and 3,678.62 is: 5,516.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.64 : 12,909.84 = 3,678.62 : x
  2. Step 2: Convert to fraction form
    8,608.64/12,909.84 = 3,678.62/x
  3. Step 3: Cross multiply
    8,608.64x = 12,909.84 × 3,678.62
  4. Step 4: Simplify right side
    8,608.64x = 47,490,395.62
  5. Step 5: Solve for x
    x = 47,490,395.62/8,608.64
  6. Step 6: Final answer
    x = 5,516.60

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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.