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Finding the Fourth Proportional to 30,174.53, 41,654.57 and 20,629.88

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Solution

The fourth proportional to 30,174.53, 41,654.57 and 20,629.88 is: 28,478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,174.53 : 41,654.57 = 20,629.88 : x
  2. Step 2: Convert to fraction form
    30,174.53/41,654.57 = 20,629.88/x
  3. Step 3: Cross multiply
    30,174.53x = 41,654.57 × 20,629.88
  4. Step 4: Simplify right side
    30,174.53x = 859,328,469.13
  5. Step 5: Solve for x
    x = 859,328,469.13/30,174.53
  6. Step 6: Final answer
    x = 28,478.60

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1.5x scale

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.