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Finding the Fourth Proportional to 18,919.98, 28,383.01 and 5,771.25

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Solution

The fourth proportional to 18,919.98, 28,383.01 and 5,771.25 is: 8,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.98 : 28,383.01 = 5,771.25 : x
  2. Step 2: Convert to fraction form
    18,919.98/28,383.01 = 5,771.25/x
  3. Step 3: Cross multiply
    18,919.98x = 28,383.01 × 5,771.25
  4. Step 4: Simplify right side
    18,919.98x = 163,805,432.03
  5. Step 5: Solve for x
    x = 163,805,432.03/18,919.98
  6. Step 6: Final answer
    x = 8,657.80

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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.