Home / 5,105.47-7,046.20-3,115.60

Finding the Fourth Proportional to 5,105.47, 7,046.20 and 3,115.60

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Solution

The fourth proportional to 5,105.47, 7,046.20 and 3,115.60 is: 4,299.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.47 : 7,046.20 = 3,115.60 : x
  2. Step 2: Convert to fraction form
    5,105.47/7,046.20 = 3,115.60/x
  3. Step 3: Cross multiply
    5,105.47x = 7,046.20 × 3,115.60
  4. Step 4: Simplify right side
    5,105.47x = 21,953,125.14
  5. Step 5: Solve for x
    x = 21,953,125.14/5,105.47
  6. Step 6: Final answer
    x = 4,299.93

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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.