Home / 5,187.78-7,772.76-3,431.16

Finding the Fourth Proportional to 5,187.78, 7,772.76 and 3,431.16

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Solution

The fourth proportional to 5,187.78, 7,772.76 and 3,431.16 is: 5,140.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.78 : 7,772.76 = 3,431.16 : x
  2. Step 2: Convert to fraction form
    5,187.78/7,772.76 = 3,431.16/x
  3. Step 3: Cross multiply
    5,187.78x = 7,772.76 × 3,431.16
  4. Step 4: Simplify right side
    5,187.78x = 26,669,583.20
  5. Step 5: Solve for x
    x = 26,669,583.20/5,187.78
  6. Step 6: Final answer
    x = 5,140.85

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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.