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Finding the Fourth Proportional to 8,438.70, 12,660.22 and 3,243.18

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Solution

The fourth proportional to 8,438.70, 12,660.22 and 3,243.18 is: 4,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.70 : 12,660.22 = 3,243.18 : x
  2. Step 2: Convert to fraction form
    8,438.70/12,660.22 = 3,243.18/x
  3. Step 3: Cross multiply
    8,438.70x = 12,660.22 × 3,243.18
  4. Step 4: Simplify right side
    8,438.70x = 41,059,372.30
  5. Step 5: Solve for x
    x = 41,059,372.30/8,438.70
  6. Step 6: Final answer
    x = 4,865.60

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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.