Home / 8,418.14-12,631.82-3,156.79

Finding the Fourth Proportional to 8,418.14, 12,631.82 and 3,156.79

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Solution

The fourth proportional to 8,418.14, 12,631.82 and 3,156.79 is: 4,736.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.14 : 12,631.82 = 3,156.79 : x
  2. Step 2: Convert to fraction form
    8,418.14/12,631.82 = 3,156.79/x
  3. Step 3: Cross multiply
    8,418.14x = 12,631.82 × 3,156.79
  4. Step 4: Simplify right side
    8,418.14x = 39,876,003.06
  5. Step 5: Solve for x
    x = 39,876,003.06/8,418.14
  6. Step 6: Final answer
    x = 4,736.91

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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.