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Finding the Fourth Proportional to 18,536.96, 27,806.97 and 5,389.31

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Solution

The fourth proportional to 18,536.96, 27,806.97 and 5,389.31 is: 8,084.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,536.96 : 27,806.97 = 5,389.31 : x
  2. Step 2: Convert to fraction form
    18,536.96/27,806.97 = 5,389.31/x
  3. Step 3: Cross multiply
    18,536.96x = 27,806.97 × 5,389.31
  4. Step 4: Simplify right side
    18,536.96x = 149,860,381.49
  5. Step 5: Solve for x
    x = 149,860,381.49/18,536.96
  6. Step 6: Final answer
    x = 8,084.41

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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.