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Finding the Fourth Proportional to 8,422.56, 12,636.18 and 3,228.84

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Solution

The fourth proportional to 8,422.56, 12,636.18 and 3,228.84 is: 4,844.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.56 : 12,636.18 = 3,228.84 : x
  2. Step 2: Convert to fraction form
    8,422.56/12,636.18 = 3,228.84/x
  3. Step 3: Cross multiply
    8,422.56x = 12,636.18 × 3,228.84
  4. Step 4: Simplify right side
    8,422.56x = 40,800,203.43
  5. Step 5: Solve for x
    x = 40,800,203.43/8,422.56
  6. Step 6: Final answer
    x = 4,844.16

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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.