Home / 8,317.40-12,470.32-3,121.88

Finding the Fourth Proportional to 8,317.40, 12,470.32 and 3,121.88

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Solution

The fourth proportional to 8,317.40, 12,470.32 and 3,121.88 is: 4,680.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,317.40 : 12,470.32 = 3,121.88 : x
  2. Step 2: Convert to fraction form
    8,317.40/12,470.32 = 3,121.88/x
  3. Step 3: Cross multiply
    8,317.40x = 12,470.32 × 3,121.88
  4. Step 4: Simplify right side
    8,317.40x = 38,930,842.60
  5. Step 5: Solve for x
    x = 38,930,842.60/8,317.40
  6. Step 6: Final answer
    x = 4,680.65

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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.