Home / 8,198.40-12,297.60-5,428.20

Finding the Fourth Proportional to 8,198.40, 12,297.60 and 5,428.20

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Solution

The fourth proportional to 8,198.40, 12,297.60 and 5,428.20 is: 8,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,198.40 : 12,297.60 = 5,428.20 : x
  2. Step 2: Convert to fraction form
    8,198.40/12,297.60 = 5,428.20/x
  3. Step 3: Cross multiply
    8,198.40x = 12,297.60 × 5,428.20
  4. Step 4: Simplify right side
    8,198.40x = 66,753,832.32
  5. Step 5: Solve for x
    x = 66,753,832.32/8,198.40
  6. Step 6: Final answer
    x = 8,142.30

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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.