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Finding the Fourth Proportional to 8,212.29, 12,315.23 and 2,664.29

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Solution

The fourth proportional to 8,212.29, 12,315.23 and 2,664.29 is: 3,995.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.29 : 12,315.23 = 2,664.29 : x
  2. Step 2: Convert to fraction form
    8,212.29/12,315.23 = 2,664.29/x
  3. Step 3: Cross multiply
    8,212.29x = 12,315.23 × 2,664.29
  4. Step 4: Simplify right side
    8,212.29x = 32,811,344.14
  5. Step 5: Solve for x
    x = 32,811,344.14/8,212.29
  6. Step 6: Final answer
    x = 3,995.40

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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.