Home / 5,265.78-7,900.11-2,143.86

Finding the Fourth Proportional to 5,265.78, 7,900.11 and 2,143.86

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Solution

The fourth proportional to 5,265.78, 7,900.11 and 2,143.86 is: 3,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,265.78 : 7,900.11 = 2,143.86 : x
  2. Step 2: Convert to fraction form
    5,265.78/7,900.11 = 2,143.86/x
  3. Step 3: Cross multiply
    5,265.78x = 7,900.11 × 2,143.86
  4. Step 4: Simplify right side
    5,265.78x = 16,936,729.82
  5. Step 5: Solve for x
    x = 16,936,729.82/5,265.78
  6. Step 6: Final answer
    x = 3,216.38

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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.