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Finding the Fourth Proportional to 18,803.21, 28,208.05 and 6,324.44

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Solution

The fourth proportional to 18,803.21, 28,208.05 and 6,324.44 is: 9,487.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.21 : 28,208.05 = 6,324.44 : x
  2. Step 2: Convert to fraction form
    18,803.21/28,208.05 = 6,324.44/x
  3. Step 3: Cross multiply
    18,803.21x = 28,208.05 × 6,324.44
  4. Step 4: Simplify right side
    18,803.21x = 178,399,962.89
  5. Step 5: Solve for x
    x = 178,399,962.89/18,803.21
  6. Step 6: Final answer
    x = 9,487.74

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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.