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Finding the Fourth Proportional to 8,380.40, 12,552.40 and 3,984.56

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Solution

The fourth proportional to 8,380.40, 12,552.40 and 3,984.56 is: 5,968.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.40 : 12,552.40 = 3,984.56 : x
  2. Step 2: Convert to fraction form
    8,380.40/12,552.40 = 3,984.56/x
  3. Step 3: Cross multiply
    8,380.40x = 12,552.40 × 3,984.56
  4. Step 4: Simplify right side
    8,380.40x = 50,015,790.94
  5. Step 5: Solve for x
    x = 50,015,790.94/8,380.40
  6. Step 6: Final answer
    x = 5,968.19

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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.