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Finding the Fourth Proportional to 7,791.76, 11,671.43 and 5,285.08

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Solution

The fourth proportional to 7,791.76, 11,671.43 and 5,285.08 is: 7,916.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.76 : 11,671.43 = 5,285.08 : x
  2. Step 2: Convert to fraction form
    7,791.76/11,671.43 = 5,285.08/x
  3. Step 3: Cross multiply
    7,791.76x = 11,671.43 × 5,285.08
  4. Step 4: Simplify right side
    7,791.76x = 61,684,382.91
  5. Step 5: Solve for x
    x = 61,684,382.91/7,791.76
  6. Step 6: Final answer
    x = 7,916.62

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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.