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Finding the Fourth Proportional to 7,791.85, 11,687.79 and 1,948.46

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Solution

The fourth proportional to 7,791.85, 11,687.79 and 1,948.46 is: 2,922.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.85 : 11,687.79 = 1,948.46 : x
  2. Step 2: Convert to fraction form
    7,791.85/11,687.79 = 1,948.46/x
  3. Step 3: Cross multiply
    7,791.85x = 11,687.79 × 1,948.46
  4. Step 4: Simplify right side
    7,791.85x = 22,773,132.86
  5. Step 5: Solve for x
    x = 22,773,132.86/7,791.85
  6. Step 6: Final answer
    x = 2,922.69

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Similar ratio
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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.