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Finding the Fourth Proportional to 8,411.20, 12,609.90 and 3,966.70

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Solution

The fourth proportional to 8,411.20, 12,609.90 and 3,966.70 is: 5,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,411.20 : 12,609.90 = 3,966.70 : x
  2. Step 2: Convert to fraction form
    8,411.20/12,609.90 = 3,966.70/x
  3. Step 3: Cross multiply
    8,411.20x = 12,609.90 × 3,966.70
  4. Step 4: Simplify right side
    8,411.20x = 50,019,690.33
  5. Step 5: Solve for x
    x = 50,019,690.33/8,411.20
  6. Step 6: Final answer
    x = 5,946.80

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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.