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Finding the Fourth Proportional to 5,169.65, 7,133.90 and 2,811.79

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Solution

The fourth proportional to 5,169.65, 7,133.90 and 2,811.79 is: 3,880.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.65 : 7,133.90 = 2,811.79 : x
  2. Step 2: Convert to fraction form
    5,169.65/7,133.90 = 2,811.79/x
  3. Step 3: Cross multiply
    5,169.65x = 7,133.90 × 2,811.79
  4. Step 4: Simplify right side
    5,169.65x = 20,058,993.01
  5. Step 5: Solve for x
    x = 20,058,993.01/5,169.65
  6. Step 6: Final answer
    x = 3,880.15

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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.