Home / 5,112.72-7,662.60-2,187.81

Finding the Fourth Proportional to 5,112.72, 7,662.60 and 2,187.81

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Solution

The fourth proportional to 5,112.72, 7,662.60 and 2,187.81 is: 3,278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,112.72 : 7,662.60 = 2,187.81 : x
  2. Step 2: Convert to fraction form
    5,112.72/7,662.60 = 2,187.81/x
  3. Step 3: Cross multiply
    5,112.72x = 7,662.60 × 2,187.81
  4. Step 4: Simplify right side
    5,112.72x = 16,764,312.91
  5. Step 5: Solve for x
    x = 16,764,312.91/5,112.72
  6. Step 6: Final answer
    x = 3,278.94

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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.