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Finding the Fourth Proportional to 27,993.94, 38,629.08 and 16,661.61

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Solution

The fourth proportional to 27,993.94, 38,629.08 and 16,661.61 is: 22,991.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,993.94 : 38,629.08 = 16,661.61 : x
  2. Step 2: Convert to fraction form
    27,993.94/38,629.08 = 16,661.61/x
  3. Step 3: Cross multiply
    27,993.94x = 38,629.08 × 16,661.61
  4. Step 4: Simplify right side
    27,993.94x = 643,622,665.62
  5. Step 5: Solve for x
    x = 643,622,665.62/27,993.94
  6. Step 6: Final answer
    x = 22,991.50

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1.5x scale

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.