Home / 8,440.60-12,665.40-3,179.20

Finding the Fourth Proportional to 8,440.60, 12,665.40 and 3,179.20

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Solution

The fourth proportional to 8,440.60, 12,665.40 and 3,179.20 is: 4,770.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,440.60 : 12,665.40 = 3,179.20 : x
  2. Step 2: Convert to fraction form
    8,440.60/12,665.40 = 3,179.20/x
  3. Step 3: Cross multiply
    8,440.60x = 12,665.40 × 3,179.20
  4. Step 4: Simplify right side
    8,440.60x = 40,265,839.68
  5. Step 5: Solve for x
    x = 40,265,839.68/8,440.60
  6. Step 6: Final answer
    x = 4,770.49

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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.