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Finding the Fourth Proportional to 18,509.31, 27,765.05 and 5,361.39

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Solution

The fourth proportional to 18,509.31, 27,765.05 and 5,361.39 is: 8,042.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.31 : 27,765.05 = 5,361.39 : x
  2. Step 2: Convert to fraction form
    18,509.31/27,765.05 = 5,361.39/x
  3. Step 3: Cross multiply
    18,509.31x = 27,765.05 × 5,361.39
  4. Step 4: Simplify right side
    18,509.31x = 148,859,234.61
  5. Step 5: Solve for x
    x = 148,859,234.61/18,509.31
  6. Step 6: Final answer
    x = 8,042.40

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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.