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Finding the Fourth Proportional to 18,899.98, 28,325.31 and 7,793.98

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Solution

The fourth proportional to 18,899.98, 28,325.31 and 7,793.98 is: 11,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.98 : 28,325.31 = 7,793.98 : x
  2. Step 2: Convert to fraction form
    18,899.98/28,325.31 = 7,793.98/x
  3. Step 3: Cross multiply
    18,899.98x = 28,325.31 × 7,793.98
  4. Step 4: Simplify right side
    18,899.98x = 220,766,899.63
  5. Step 5: Solve for x
    x = 220,766,899.63/18,899.98
  6. Step 6: Final answer
    x = 11,680.80

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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.