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Finding the Fourth Proportional to 30,405, 41,958.90 and 17,157

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Solution

The fourth proportional to 30,405, 41,958.90 and 17,157 is: 23,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,405 : 41,958.90 = 17,157 : x
  2. Step 2: Convert to fraction form
    30,405/41,958.90 = 17,157/x
  3. Step 3: Cross multiply
    30,405x = 41,958.90 × 17,157
  4. Step 4: Simplify right side
    30,405x = 719,888,847.30
  5. Step 5: Solve for x
    x = 719,888,847.30/30,405
  6. Step 6: Final answer
    x = 23,676.66

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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.