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Finding the Fourth Proportional to 5,169.66, 7,133.76 and 2,811.75

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Solution

The fourth proportional to 5,169.66, 7,133.76 and 2,811.75 is: 3,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.66 : 7,133.76 = 2,811.75 : x
  2. Step 2: Convert to fraction form
    5,169.66/7,133.76 = 2,811.75/x
  3. Step 3: Cross multiply
    5,169.66x = 7,133.76 × 2,811.75
  4. Step 4: Simplify right side
    5,169.66x = 20,058,349.68
  5. Step 5: Solve for x
    x = 20,058,349.68/5,169.66
  6. Step 6: Final answer
    x = 3,880.01

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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.