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Finding the Fourth Proportional to 18,279.42, 27,422.01 and 7,749.47

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Solution

The fourth proportional to 18,279.42, 27,422.01 and 7,749.47 is: 11,625.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.42 : 27,422.01 = 7,749.47 : x
  2. Step 2: Convert to fraction form
    18,279.42/27,422.01 = 7,749.47/x
  3. Step 3: Cross multiply
    18,279.42x = 27,422.01 × 7,749.47
  4. Step 4: Simplify right side
    18,279.42x = 212,505,906.72
  5. Step 5: Solve for x
    x = 212,505,906.72/18,279.42
  6. Step 6: Final answer
    x = 11,625.42

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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.