Home / 5,112.38-7,668.55-2,188.78

Finding the Fourth Proportional to 5,112.38, 7,668.55 and 2,188.78

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Solution

The fourth proportional to 5,112.38, 7,668.55 and 2,188.78 is: 3,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,112.38 : 7,668.55 = 2,188.78 : x
  2. Step 2: Convert to fraction form
    5,112.38/7,668.55 = 2,188.78/x
  3. Step 3: Cross multiply
    5,112.38x = 7,668.55 × 2,188.78
  4. Step 4: Simplify right side
    5,112.38x = 16,784,768.87
  5. Step 5: Solve for x
    x = 16,784,768.87/5,112.38
  6. Step 6: Final answer
    x = 3,283.16

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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.