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Finding the Fourth Proportional to 6,978.03, 9,629.85 and 3,791.32

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Solution

The fourth proportional to 6,978.03, 9,629.85 and 3,791.32 is: 5,232.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978.03 : 9,629.85 = 3,791.32 : x
  2. Step 2: Convert to fraction form
    6,978.03/9,629.85 = 3,791.32/x
  3. Step 3: Cross multiply
    6,978.03x = 9,629.85 × 3,791.32
  4. Step 4: Simplify right side
    6,978.03x = 36,509,842.90
  5. Step 5: Solve for x
    x = 36,509,842.90/6,978.03
  6. Step 6: Final answer
    x = 5,232.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.