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Finding the Fourth Proportional to 8,405.94, 12,608.92 and 2,859.88

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Solution

The fourth proportional to 8,405.94, 12,608.92 and 2,859.88 is: 4,289.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.94 : 12,608.92 = 2,859.88 : x
  2. Step 2: Convert to fraction form
    8,405.94/12,608.92 = 2,859.88/x
  3. Step 3: Cross multiply
    8,405.94x = 12,608.92 × 2,859.88
  4. Step 4: Simplify right side
    8,405.94x = 36,059,998.13
  5. Step 5: Solve for x
    x = 36,059,998.13/8,405.94
  6. Step 6: Final answer
    x = 4,289.82

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Similar ratio
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1.5x scale

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.