Home / 8,212.68-12,320.13-2,664.21

Finding the Fourth Proportional to 8,212.68, 12,320.13 and 2,664.21

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Solution

The fourth proportional to 8,212.68, 12,320.13 and 2,664.21 is: 3,996.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.68 : 12,320.13 = 2,664.21 : x
  2. Step 2: Convert to fraction form
    8,212.68/12,320.13 = 2,664.21/x
  3. Step 3: Cross multiply
    8,212.68x = 12,320.13 × 2,664.21
  4. Step 4: Simplify right side
    8,212.68x = 32,823,469.74
  5. Step 5: Solve for x
    x = 32,823,469.74/8,212.68
  6. Step 6: Final answer
    x = 3,996.68

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1.5x scale

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.