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Finding the Fourth Proportional to 12,660.49, 18,991.05 and 3,895.48

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Solution

The fourth proportional to 12,660.49, 18,991.05 and 3,895.48 is: 5,843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.49 : 18,991.05 = 3,895.48 : x
  2. Step 2: Convert to fraction form
    12,660.49/18,991.05 = 3,895.48/x
  3. Step 3: Cross multiply
    12,660.49x = 18,991.05 × 3,895.48
  4. Step 4: Simplify right side
    12,660.49x = 73,979,255.45
  5. Step 5: Solve for x
    x = 73,979,255.45/12,660.49
  6. Step 6: Final answer
    x = 5,843.32

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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.