Home / 5,678.43-8,517.29-2,119.86

Finding the Fourth Proportional to 5,678.43, 8,517.29 and 2,119.86

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Solution

The fourth proportional to 5,678.43, 8,517.29 and 2,119.86 is: 3,179.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.43 : 8,517.29 = 2,119.86 : x
  2. Step 2: Convert to fraction form
    5,678.43/8,517.29 = 2,119.86/x
  3. Step 3: Cross multiply
    5,678.43x = 8,517.29 × 2,119.86
  4. Step 4: Simplify right side
    5,678.43x = 18,055,428.50
  5. Step 5: Solve for x
    x = 18,055,428.50/5,678.43
  6. Step 6: Final answer
    x = 3,179.65

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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.