Home / 5,115.76-7,061.18-2,991.94

Finding the Fourth Proportional to 5,115.76, 7,061.18 and 2,991.94

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Solution

The fourth proportional to 5,115.76, 7,061.18 and 2,991.94 is: 4,129.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.76 : 7,061.18 = 2,991.94 : x
  2. Step 2: Convert to fraction form
    5,115.76/7,061.18 = 2,991.94/x
  3. Step 3: Cross multiply
    5,115.76x = 7,061.18 × 2,991.94
  4. Step 4: Simplify right side
    5,115.76x = 21,126,594.28
  5. Step 5: Solve for x
    x = 21,126,594.28/5,115.76
  6. Step 6: Final answer
    x = 4,129.71

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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.