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Finding the Fourth Proportional to 7,921.29, 11,881.69 and 3,764.29

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Solution

The fourth proportional to 7,921.29, 11,881.69 and 3,764.29 is: 5,646.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.29 : 11,881.69 = 3,764.29 : x
  2. Step 2: Convert to fraction form
    7,921.29/11,881.69 = 3,764.29/x
  3. Step 3: Cross multiply
    7,921.29x = 11,881.69 × 3,764.29
  4. Step 4: Simplify right side
    7,921.29x = 44,726,126.85
  5. Step 5: Solve for x
    x = 44,726,126.85/7,921.29
  6. Step 6: Final answer
    x = 5,646.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.