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Finding the Fourth Proportional to 5,169.69, 7,134.18 and 2,811.87

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Solution

The fourth proportional to 5,169.69, 7,134.18 and 2,811.87 is: 3,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.69 : 7,134.18 = 2,811.87 : x
  2. Step 2: Convert to fraction form
    5,169.69/7,134.18 = 2,811.87/x
  3. Step 3: Cross multiply
    5,169.69x = 7,134.18 × 2,811.87
  4. Step 4: Simplify right side
    5,169.69x = 20,060,386.72
  5. Step 5: Solve for x
    x = 20,060,386.72/5,169.69
  6. Step 6: Final answer
    x = 3,880.38

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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.