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Finding the Fourth Proportional to 18,536.69, 27,809.40 and 5,388.68

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Solution

The fourth proportional to 18,536.69, 27,809.40 and 5,388.68 is: 8,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,536.69 : 27,809.40 = 5,388.68 : x
  2. Step 2: Convert to fraction form
    18,536.69/27,809.40 = 5,388.68/x
  3. Step 3: Cross multiply
    18,536.69x = 27,809.40 × 5,388.68
  4. Step 4: Simplify right side
    18,536.69x = 149,855,957.59
  5. Step 5: Solve for x
    x = 149,855,957.59/18,536.69
  6. Step 6: Final answer
    x = 8,084.29

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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.