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Finding the Fourth Proportional to 7,881.93, 11,839.29 and 6,651.72

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Solution

The fourth proportional to 7,881.93, 11,839.29 and 6,651.72 is: 9,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.93 : 11,839.29 = 6,651.72 : x
  2. Step 2: Convert to fraction form
    7,881.93/11,839.29 = 6,651.72/x
  3. Step 3: Cross multiply
    7,881.93x = 11,839.29 × 6,651.72
  4. Step 4: Simplify right side
    7,881.93x = 78,751,642.08
  5. Step 5: Solve for x
    x = 78,751,642.08/7,881.93
  6. Step 6: Final answer
    x = 9,991.42

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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.