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Finding the Fourth Proportional to 18,740, 28,110.27 and 4,889

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Solution

The fourth proportional to 18,740, 28,110.27 and 4,889 is: 7,333.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,740 : 28,110.27 = 4,889 : x
  2. Step 2: Convert to fraction form
    18,740/28,110.27 = 4,889/x
  3. Step 3: Cross multiply
    18,740x = 28,110.27 × 4,889
  4. Step 4: Simplify right side
    18,740x = 137,431,110.03
  5. Step 5: Solve for x
    x = 137,431,110.03/18,740
  6. Step 6: Final answer
    x = 7,333.57

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.