Home / 8,631.77-12,936.31-3,431.57

Finding the Fourth Proportional to 8,631.77, 12,936.31 and 3,431.57

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Solution

The fourth proportional to 8,631.77, 12,936.31 and 3,431.57 is: 5,142.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.77 : 12,936.31 = 3,431.57 : x
  2. Step 2: Convert to fraction form
    8,631.77/12,936.31 = 3,431.57/x
  3. Step 3: Cross multiply
    8,631.77x = 12,936.31 × 3,431.57
  4. Step 4: Simplify right side
    8,631.77x = 44,391,780.05
  5. Step 5: Solve for x
    x = 44,391,780.05/8,631.77
  6. Step 6: Final answer
    x = 5,142.84

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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.