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Finding the Fourth Proportional to 8,847, 12,210.12 and 5,121

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Solution

The fourth proportional to 8,847, 12,210.12 and 5,121 is: 7,067.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,847 : 12,210.12 = 5,121 : x
  2. Step 2: Convert to fraction form
    8,847/12,210.12 = 5,121/x
  3. Step 3: Cross multiply
    8,847x = 12,210.12 × 5,121
  4. Step 4: Simplify right side
    8,847x = 62,528,024.52
  5. Step 5: Solve for x
    x = 62,528,024.52/8,847
  6. Step 6: Final answer
    x = 7,067.71

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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.