Home / 8,213.68-12,321.63-2,665.21

Finding the Fourth Proportional to 8,213.68, 12,321.63 and 2,665.21

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Solution

The fourth proportional to 8,213.68, 12,321.63 and 2,665.21 is: 3,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,213.68 : 12,321.63 = 2,665.21 : x
  2. Step 2: Convert to fraction form
    8,213.68/12,321.63 = 2,665.21/x
  3. Step 3: Cross multiply
    8,213.68x = 12,321.63 × 2,665.21
  4. Step 4: Simplify right side
    8,213.68x = 32,839,731.49
  5. Step 5: Solve for x
    x = 32,839,731.49/8,213.68
  6. Step 6: Final answer
    x = 3,998.18

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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.