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Finding the Fourth Proportional to 38,913, 58,379.22 and 11,211

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Solution

The fourth proportional to 38,913, 58,379.22 and 11,211 is: 16,819.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,913 : 58,379.22 = 11,211 : x
  2. Step 2: Convert to fraction form
    38,913/58,379.22 = 11,211/x
  3. Step 3: Cross multiply
    38,913x = 58,379.22 × 11,211
  4. Step 4: Simplify right side
    38,913x = 654,489,435.42
  5. Step 5: Solve for x
    x = 654,489,435.42/38,913
  6. Step 6: Final answer
    x = 16,819.30

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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.