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Finding the Fourth Proportional to 8,428.91, 12,644.99 and 3,234.38

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Solution

The fourth proportional to 8,428.91, 12,644.99 and 3,234.38 is: 4,852.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.91 : 12,644.99 = 3,234.38 : x
  2. Step 2: Convert to fraction form
    8,428.91/12,644.99 = 3,234.38/x
  3. Step 3: Cross multiply
    8,428.91x = 12,644.99 × 3,234.38
  4. Step 4: Simplify right side
    8,428.91x = 40,898,623.36
  5. Step 5: Solve for x
    x = 40,898,623.36/8,428.91
  6. Step 6: Final answer
    x = 4,852.19

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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.