Home / 8,212.24-12,319.20-3,281.20

Finding the Fourth Proportional to 8,212.24, 12,319.20 and 3,281.20

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Solution

The fourth proportional to 8,212.24, 12,319.20 and 3,281.20 is: 4,922.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.24 : 12,319.20 = 3,281.20 : x
  2. Step 2: Convert to fraction form
    8,212.24/12,319.20 = 3,281.20/x
  3. Step 3: Cross multiply
    8,212.24x = 12,319.20 × 3,281.20
  4. Step 4: Simplify right side
    8,212.24x = 40,421,759.04
  5. Step 5: Solve for x
    x = 40,421,759.04/8,212.24
  6. Step 6: Final answer
    x = 4,922.14

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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.