Home / 8,129.94-12,192.21-3,198.30

Finding the Fourth Proportional to 8,129.94, 12,192.21 and 3,198.30

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Solution

The fourth proportional to 8,129.94, 12,192.21 and 3,198.30 is: 4,796.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.94 : 12,192.21 = 3,198.30 : x
  2. Step 2: Convert to fraction form
    8,129.94/12,192.21 = 3,198.30/x
  3. Step 3: Cross multiply
    8,129.94x = 12,192.21 × 3,198.30
  4. Step 4: Simplify right side
    8,129.94x = 38,994,345.24
  5. Step 5: Solve for x
    x = 38,994,345.24/8,129.94
  6. Step 6: Final answer
    x = 4,796.39

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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.