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Finding the Fourth Proportional to 38,991.90, 58,388.22 and 21,442.44

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Solution

The fourth proportional to 38,991.90, 58,388.22 and 21,442.44 is: 32,108.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,991.90 : 58,388.22 = 21,442.44 : x
  2. Step 2: Convert to fraction form
    38,991.90/58,388.22 = 21,442.44/x
  3. Step 3: Cross multiply
    38,991.90x = 58,388.22 × 21,442.44
  4. Step 4: Simplify right side
    38,991.90x = 1,251,985,904.06
  5. Step 5: Solve for x
    x = 1,251,985,904.06/38,991.90
  6. Step 6: Final answer
    x = 32,108.87

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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.