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Finding the Fourth Proportional to 8,395.20, 12,578.40 and 4,003.20

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Solution

The fourth proportional to 8,395.20, 12,578.40 and 4,003.20 is: 5,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,395.20 : 12,578.40 = 4,003.20 : x
  2. Step 2: Convert to fraction form
    8,395.20/12,578.40 = 4,003.20/x
  3. Step 3: Cross multiply
    8,395.20x = 12,578.40 × 4,003.20
  4. Step 4: Simplify right side
    8,395.20x = 50,353,850.88
  5. Step 5: Solve for x
    x = 50,353,850.88/8,395.20
  6. Step 6: Final answer
    x = 5,997.93

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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.