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Finding the Fourth Proportional to 7,855.31, 11,773.38 and 3,689.76

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Solution

The fourth proportional to 7,855.31, 11,773.38 and 3,689.76 is: 5,530.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.31 : 11,773.38 = 3,689.76 : x
  2. Step 2: Convert to fraction form
    7,855.31/11,773.38 = 3,689.76/x
  3. Step 3: Cross multiply
    7,855.31x = 11,773.38 × 3,689.76
  4. Step 4: Simplify right side
    7,855.31x = 43,440,869.27
  5. Step 5: Solve for x
    x = 43,440,869.27/7,855.31
  6. Step 6: Final answer
    x = 5,530.13

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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.