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Finding the Fourth Proportional to 18,279.13, 27,418.83 and 4,428.13

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Solution

The fourth proportional to 18,279.13, 27,418.83 and 4,428.13 is: 6,642.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.13 : 27,418.83 = 4,428.13 : x
  2. Step 2: Convert to fraction form
    18,279.13/27,418.83 = 4,428.13/x
  3. Step 3: Cross multiply
    18,279.13x = 27,418.83 × 4,428.13
  4. Step 4: Simplify right side
    18,279.13x = 121,414,006.59
  5. Step 5: Solve for x
    x = 121,414,006.59/18,279.13
  6. Step 6: Final answer
    x = 6,642.22

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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.