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Finding the Fourth Proportional to 18,661.82, 27,991.77 and 6,974.12

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Solution

The fourth proportional to 18,661.82, 27,991.77 and 6,974.12 is: 10,460.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.82 : 27,991.77 = 6,974.12 : x
  2. Step 2: Convert to fraction form
    18,661.82/27,991.77 = 6,974.12/x
  3. Step 3: Cross multiply
    18,661.82x = 27,991.77 × 6,974.12
  4. Step 4: Simplify right side
    18,661.82x = 195,217,962.99
  5. Step 5: Solve for x
    x = 195,217,962.99/18,661.82
  6. Step 6: Final answer
    x = 10,460.82

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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.