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Finding the Fourth Proportional to 57,659.89, 86,489.32 and 18,217

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Solution

The fourth proportional to 57,659.89, 86,489.32 and 18,217 is: 27,325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,659.89 : 86,489.32 = 18,217 : x
  2. Step 2: Convert to fraction form
    57,659.89/86,489.32 = 18,217/x
  3. Step 3: Cross multiply
    57,659.89x = 86,489.32 × 18,217
  4. Step 4: Simplify right side
    57,659.89x = 1,575,575,942.44
  5. Step 5: Solve for x
    x = 1,575,575,942.44/57,659.89
  6. Step 6: Final answer
    x = 27,325.34

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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.