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Finding the Fourth Proportional to 12,661.49, 18,992.55 and 3,896.48

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Solution

The fourth proportional to 12,661.49, 18,992.55 and 3,896.48 is: 5,844.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.49 : 18,992.55 = 3,896.48 : x
  2. Step 2: Convert to fraction form
    12,661.49/18,992.55 = 3,896.48/x
  3. Step 3: Cross multiply
    12,661.49x = 18,992.55 × 3,896.48
  4. Step 4: Simplify right side
    12,661.49x = 74,004,091.22
  5. Step 5: Solve for x
    x = 74,004,091.22/12,661.49
  6. Step 6: Final answer
    x = 5,844.82

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1.5x scale

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.