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Finding the Fourth Proportional to 18,905.52, 28,361.01 and 5,757.54

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Solution

The fourth proportional to 18,905.52, 28,361.01 and 5,757.54 is: 8,637.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.52 : 28,361.01 = 5,757.54 : x
  2. Step 2: Convert to fraction form
    18,905.52/28,361.01 = 5,757.54/x
  3. Step 3: Cross multiply
    18,905.52x = 28,361.01 × 5,757.54
  4. Step 4: Simplify right side
    18,905.52x = 163,289,649.52
  5. Step 5: Solve for x
    x = 163,289,649.52/18,905.52
  6. Step 6: Final answer
    x = 8,637.14

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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.