Home / 8,438.91-12,664.70-3,179.11

Finding the Fourth Proportional to 8,438.91, 12,664.70 and 3,179.11

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Solution

The fourth proportional to 8,438.91, 12,664.70 and 3,179.11 is: 4,771.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.91 : 12,664.70 = 3,179.11 : x
  2. Step 2: Convert to fraction form
    8,438.91/12,664.70 = 3,179.11/x
  3. Step 3: Cross multiply
    8,438.91x = 12,664.70 × 3,179.11
  4. Step 4: Simplify right side
    8,438.91x = 40,262,474.42
  5. Step 5: Solve for x
    x = 40,262,474.42/8,438.91
  6. Step 6: Final answer
    x = 4,771.05

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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.