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Finding the Fourth Proportional to 29,115.96, 40,168.62 and 17,918.52

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Solution

The fourth proportional to 29,115.96, 40,168.62 and 17,918.52 is: 24,720.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,115.96 : 40,168.62 = 17,918.52 : x
  2. Step 2: Convert to fraction form
    29,115.96/40,168.62 = 17,918.52/x
  3. Step 3: Cross multiply
    29,115.96x = 40,168.62 × 17,918.52
  4. Step 4: Simplify right side
    29,115.96x = 719,762,220.84
  5. Step 5: Solve for x
    x = 719,762,220.84/29,115.96
  6. Step 6: Final answer
    x = 24,720.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.