Home / 8,420.31-12,629.75-2,873.79

Finding the Fourth Proportional to 8,420.31, 12,629.75 and 2,873.79

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Solution

The fourth proportional to 8,420.31, 12,629.75 and 2,873.79 is: 4,310.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.31 : 12,629.75 = 2,873.79 : x
  2. Step 2: Convert to fraction form
    8,420.31/12,629.75 = 2,873.79/x
  3. Step 3: Cross multiply
    8,420.31x = 12,629.75 × 2,873.79
  4. Step 4: Simplify right side
    8,420.31x = 36,295,234.88
  5. Step 5: Solve for x
    x = 36,295,234.88/8,420.31
  6. Step 6: Final answer
    x = 4,310.44

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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.