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Finding the Fourth Proportional to 22,912.77, 34,363.77 and 12,921.81

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Solution

The fourth proportional to 22,912.77, 34,363.77 and 12,921.81 is: 19,379.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,912.77 : 34,363.77 = 12,921.81 : x
  2. Step 2: Convert to fraction form
    22,912.77/34,363.77 = 12,921.81/x
  3. Step 3: Cross multiply
    22,912.77x = 34,363.77 × 12,921.81
  4. Step 4: Simplify right side
    22,912.77x = 444,042,106.82
  5. Step 5: Solve for x
    x = 444,042,106.82/22,912.77
  6. Step 6: Final answer
    x = 19,379.68

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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.