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Finding the Fourth Proportional to 18,189.90, 27,278.91 and 7,093.80

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Solution

The fourth proportional to 18,189.90, 27,278.91 and 7,093.80 is: 10,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,189.90 : 27,278.91 = 7,093.80 : x
  2. Step 2: Convert to fraction form
    18,189.90/27,278.91 = 7,093.80/x
  3. Step 3: Cross multiply
    18,189.90x = 27,278.91 × 7,093.80
  4. Step 4: Simplify right side
    18,189.90x = 193,511,131.76
  5. Step 5: Solve for x
    x = 193,511,131.76/18,189.90
  6. Step 6: Final answer
    x = 10,638.38

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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.