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Finding the Fourth Proportional to 8,608, 12,909.19 and 3,342.64

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Solution

The fourth proportional to 8,608, 12,909.19 and 3,342.64 is: 5,012.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608 : 12,909.19 = 3,342.64 : x
  2. Step 2: Convert to fraction form
    8,608/12,909.19 = 3,342.64/x
  3. Step 3: Cross multiply
    8,608x = 12,909.19 × 3,342.64
  4. Step 4: Simplify right side
    8,608x = 43,150,774.86
  5. Step 5: Solve for x
    x = 43,150,774.86/8,608
  6. Step 6: Final answer
    x = 5,012.87

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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.