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Finding the Fourth Proportional to 5,160.66, 7,120.13 and 3,169.95

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Solution

The fourth proportional to 5,160.66, 7,120.13 and 3,169.95 is: 4,373.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.66 : 7,120.13 = 3,169.95 : x
  2. Step 2: Convert to fraction form
    5,160.66/7,120.13 = 3,169.95/x
  3. Step 3: Cross multiply
    5,160.66x = 7,120.13 × 3,169.95
  4. Step 4: Simplify right side
    5,160.66x = 22,570,456.09
  5. Step 5: Solve for x
    x = 22,570,456.09/5,160.66
  6. Step 6: Final answer
    x = 4,373.56

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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.