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Finding the Fourth Proportional to 18,690.23, 28,035.17 and 6,211.17

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Solution

The fourth proportional to 18,690.23, 28,035.17 and 6,211.17 is: 9,316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.23 : 28,035.17 = 6,211.17 : x
  2. Step 2: Convert to fraction form
    18,690.23/28,035.17 = 6,211.17/x
  3. Step 3: Cross multiply
    18,690.23x = 28,035.17 × 6,211.17
  4. Step 4: Simplify right side
    18,690.23x = 174,131,175.79
  5. Step 5: Solve for x
    x = 174,131,175.79/18,690.23
  6. Step 6: Final answer
    x = 9,316.70

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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.