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Finding the Fourth Proportional to 6,663.66, 9,992.22 and 3,891.03

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Solution

The fourth proportional to 6,663.66, 9,992.22 and 3,891.03 is: 5,834.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,663.66 : 9,992.22 = 3,891.03 : x
  2. Step 2: Convert to fraction form
    6,663.66/9,992.22 = 3,891.03/x
  3. Step 3: Cross multiply
    6,663.66x = 9,992.22 × 3,891.03
  4. Step 4: Simplify right side
    6,663.66x = 38,880,027.79
  5. Step 5: Solve for x
    x = 38,880,027.79/6,663.66
  6. Step 6: Final answer
    x = 5,834.64

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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.