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Finding the Fourth Proportional to 18,620.82, 27,881.28 and 15,668.37

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Solution

The fourth proportional to 18,620.82, 27,881.28 and 15,668.37 is: 23,460.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.82 : 27,881.28 = 15,668.37 : x
  2. Step 2: Convert to fraction form
    18,620.82/27,881.28 = 15,668.37/x
  3. Step 3: Cross multiply
    18,620.82x = 27,881.28 × 15,668.37
  4. Step 4: Simplify right side
    18,620.82x = 436,854,211.11
  5. Step 5: Solve for x
    x = 436,854,211.11/18,620.82
  6. Step 6: Final answer
    x = 23,460.52

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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.