Home / 8,171.20-12,250.80-2,621.36

Finding the Fourth Proportional to 8,171.20, 12,250.80 and 2,621.36

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Solution

The fourth proportional to 8,171.20, 12,250.80 and 2,621.36 is: 3,930.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,171.20 : 12,250.80 = 2,621.36 : x
  2. Step 2: Convert to fraction form
    8,171.20/12,250.80 = 2,621.36/x
  3. Step 3: Cross multiply
    8,171.20x = 12,250.80 × 2,621.36
  4. Step 4: Simplify right side
    8,171.20x = 32,113,757.09
  5. Step 5: Solve for x
    x = 32,113,757.09/8,171.20
  6. Step 6: Final answer
    x = 3,930.12

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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.