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Finding the Fourth Proportional to 34,786.26, 47,992.50 and 20,638.80

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Solution

The fourth proportional to 34,786.26, 47,992.50 and 20,638.80 is: 28,474.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,786.26 : 47,992.50 = 20,638.80 : x
  2. Step 2: Convert to fraction form
    34,786.26/47,992.50 = 20,638.80/x
  3. Step 3: Cross multiply
    34,786.26x = 47,992.50 × 20,638.80
  4. Step 4: Simplify right side
    34,786.26x = 990,507,609
  5. Step 5: Solve for x
    x = 990,507,609/34,786.26
  6. Step 6: Final answer
    x = 28,474.10

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