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Finding the Fourth Proportional to 18,690.68, 28,035.66 and 4,839.32

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Solution

The fourth proportional to 18,690.68, 28,035.66 and 4,839.32 is: 7,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.68 : 28,035.66 = 4,839.32 : x
  2. Step 2: Convert to fraction form
    18,690.68/28,035.66 = 4,839.32/x
  3. Step 3: Cross multiply
    18,690.68x = 28,035.66 × 4,839.32
  4. Step 4: Simplify right side
    18,690.68x = 135,673,530.15
  5. Step 5: Solve for x
    x = 135,673,530.15/18,690.68
  6. Step 6: Final answer
    x = 7,258.89

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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.