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Finding the Fourth Proportional to 18,618.33, 27,939.80 and 8,758.38

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Solution

The fourth proportional to 18,618.33, 27,939.80 and 8,758.38 is: 13,143.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.33 : 27,939.80 = 8,758.38 : x
  2. Step 2: Convert to fraction form
    18,618.33/27,939.80 = 8,758.38/x
  3. Step 3: Cross multiply
    18,618.33x = 27,939.80 × 8,758.38
  4. Step 4: Simplify right side
    18,618.33x = 244,707,383.07
  5. Step 5: Solve for x
    x = 244,707,383.07/18,618.33
  6. Step 6: Final answer
    x = 13,143.36

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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.