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Finding the Fourth Proportional to 18,726, 28,093.62 and 5,578.32

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Solution

The fourth proportional to 18,726, 28,093.62 and 5,578.32 is: 8,368.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726 : 28,093.62 = 5,578.32 : x
  2. Step 2: Convert to fraction form
    18,726/28,093.62 = 5,578.32/x
  3. Step 3: Cross multiply
    18,726x = 28,093.62 × 5,578.32
  4. Step 4: Simplify right side
    18,726x = 156,715,202.32
  5. Step 5: Solve for x
    x = 156,715,202.32/18,726
  6. Step 6: Final answer
    x = 8,368.86

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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.