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Finding the Fourth Proportional to 18,690.22, 28,035.33 and 4,839.22

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Solution

The fourth proportional to 18,690.22, 28,035.33 and 4,839.22 is: 7,258.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.22 : 28,035.33 = 4,839.22 : x
  2. Step 2: Convert to fraction form
    18,690.22/28,035.33 = 4,839.22/x
  3. Step 3: Cross multiply
    18,690.22x = 28,035.33 × 4,839.22
  4. Step 4: Simplify right side
    18,690.22x = 135,669,129.64
  5. Step 5: Solve for x
    x = 135,669,129.64/18,690.22
  6. Step 6: Final answer
    x = 7,258.83

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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.