Home / 5,218.78-7,203.99-3,122.50

Finding the Fourth Proportional to 5,218.78, 7,203.99 and 3,122.50

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Solution

The fourth proportional to 5,218.78, 7,203.99 and 3,122.50 is: 4,310.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.78 : 7,203.99 = 3,122.50 : x
  2. Step 2: Convert to fraction form
    5,218.78/7,203.99 = 3,122.50/x
  3. Step 3: Cross multiply
    5,218.78x = 7,203.99 × 3,122.50
  4. Step 4: Simplify right side
    5,218.78x = 22,494,458.78
  5. Step 5: Solve for x
    x = 22,494,458.78/5,218.78
  6. Step 6: Final answer
    x = 4,310.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.