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Finding the Fourth Proportional to 18,540.90, 27,811.44 and 5,393.34

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Solution

The fourth proportional to 18,540.90, 27,811.44 and 5,393.34 is: 8,090.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,540.90 : 27,811.44 = 5,393.34 : x
  2. Step 2: Convert to fraction form
    18,540.90/27,811.44 = 5,393.34/x
  3. Step 3: Cross multiply
    18,540.90x = 27,811.44 × 5,393.34
  4. Step 4: Simplify right side
    18,540.90x = 149,996,551.81
  5. Step 5: Solve for x
    x = 149,996,551.81/18,540.90
  6. Step 6: Final answer
    x = 8,090.04

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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.