Home / 8,142.18-12,207.84-2,947.38

Finding the Fourth Proportional to 8,142.18, 12,207.84 and 2,947.38

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Solution

The fourth proportional to 8,142.18, 12,207.84 and 2,947.38 is: 4,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.18 : 12,207.84 = 2,947.38 : x
  2. Step 2: Convert to fraction form
    8,142.18/12,207.84 = 2,947.38/x
  3. Step 3: Cross multiply
    8,142.18x = 12,207.84 × 2,947.38
  4. Step 4: Simplify right side
    8,142.18x = 35,981,143.46
  5. Step 5: Solve for x
    x = 35,981,143.46/8,142.18
  6. Step 6: Final answer
    x = 4,419.10

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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.