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Finding the Fourth Proportional to 18,279.09, 27,418.68 and 4,428.09

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Solution

The fourth proportional to 18,279.09, 27,418.68 and 4,428.09 is: 6,642.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.09 : 27,418.68 = 4,428.09 : x
  2. Step 2: Convert to fraction form
    18,279.09/27,418.68 = 4,428.09/x
  3. Step 3: Cross multiply
    18,279.09x = 27,418.68 × 4,428.09
  4. Step 4: Simplify right side
    18,279.09x = 121,412,382.72
  5. Step 5: Solve for x
    x = 121,412,382.72/18,279.09
  6. Step 6: Final answer
    x = 6,642.15

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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.