Home / 12,431.76-18,647.64-3,198.48

Finding the Fourth Proportional to 12,431.76, 18,647.64 and 3,198.48

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Solution

The fourth proportional to 12,431.76, 18,647.64 and 3,198.48 is: 4,797.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.76 : 18,647.64 = 3,198.48 : x
  2. Step 2: Convert to fraction form
    12,431.76/18,647.64 = 3,198.48/x
  3. Step 3: Cross multiply
    12,431.76x = 18,647.64 × 3,198.48
  4. Step 4: Simplify right side
    12,431.76x = 59,644,103.59
  5. Step 5: Solve for x
    x = 59,644,103.59/12,431.76
  6. Step 6: Final answer
    x = 4,797.72

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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.