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Finding the Fourth Proportional to 18,279.11, 27,428.91 and 9,959.70

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Solution

The fourth proportional to 18,279.11, 27,428.91 and 9,959.70 is: 14,945.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.11 : 27,428.91 = 9,959.70 : x
  2. Step 2: Convert to fraction form
    18,279.11/27,428.91 = 9,959.70/x
  3. Step 3: Cross multiply
    18,279.11x = 27,428.91 × 9,959.70
  4. Step 4: Simplify right side
    18,279.11x = 273,183,714.93
  5. Step 5: Solve for x
    x = 273,183,714.93/18,279.11
  6. Step 6: Final answer
    x = 14,945.13

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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.