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Finding the Fourth Proportional to 18,278.19, 27,399.87 and 7,181.19

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Solution

The fourth proportional to 18,278.19, 27,399.87 and 7,181.19 is: 10,764.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.19 : 27,399.87 = 7,181.19 : x
  2. Step 2: Convert to fraction form
    18,278.19/27,399.87 = 7,181.19/x
  3. Step 3: Cross multiply
    18,278.19x = 27,399.87 × 7,181.19
  4. Step 4: Simplify right side
    18,278.19x = 196,763,672.45
  5. Step 5: Solve for x
    x = 196,763,672.45/18,278.19
  6. Step 6: Final answer
    x = 10,764.94

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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.