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Finding the Fourth Proportional to 28,729.29, 39,651.06 and 16,790.30

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Solution

The fourth proportional to 28,729.29, 39,651.06 and 16,790.30 is: 23,173.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729.29 : 39,651.06 = 16,790.30 : x
  2. Step 2: Convert to fraction form
    28,729.29/39,651.06 = 16,790.30/x
  3. Step 3: Cross multiply
    28,729.29x = 39,651.06 × 16,790.30
  4. Step 4: Simplify right side
    28,729.29x = 665,753,192.72
  5. Step 5: Solve for x
    x = 665,753,192.72/28,729.29
  6. Step 6: Final answer
    x = 23,173.33

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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.