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Finding the Fourth Proportional to 8,657.53, 11,949.83 and 5,121.97

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Solution

The fourth proportional to 8,657.53, 11,949.83 and 5,121.97 is: 7,069.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.53 : 11,949.83 = 5,121.97 : x
  2. Step 2: Convert to fraction form
    8,657.53/11,949.83 = 5,121.97/x
  3. Step 3: Cross multiply
    8,657.53x = 11,949.83 × 5,121.97
  4. Step 4: Simplify right side
    8,657.53x = 61,206,670.77
  5. Step 5: Solve for x
    x = 61,206,670.77/8,657.53
  6. Step 6: Final answer
    x = 7,069.76

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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.