Home / 8,428.91-12,636.08-3,231.14

Finding the Fourth Proportional to 8,428.91, 12,636.08 and 3,231.14

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Solution

The fourth proportional to 8,428.91, 12,636.08 and 3,231.14 is: 4,843.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.91 : 12,636.08 = 3,231.14 : x
  2. Step 2: Convert to fraction form
    8,428.91/12,636.08 = 3,231.14/x
  3. Step 3: Cross multiply
    8,428.91x = 12,636.08 × 3,231.14
  4. Step 4: Simplify right side
    8,428.91x = 40,828,938.30
  5. Step 5: Solve for x
    x = 40,828,938.30/8,428.91
  6. Step 6: Final answer
    x = 4,843.92

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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.