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Finding the Fourth Proportional to 20,696.30, 28,566.39 and 12,745.19

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Solution

The fourth proportional to 20,696.30, 28,566.39 and 12,745.19 is: 17,591.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.30 : 28,566.39 = 12,745.19 : x
  2. Step 2: Convert to fraction form
    20,696.30/28,566.39 = 12,745.19/x
  3. Step 3: Cross multiply
    20,696.30x = 28,566.39 × 12,745.19
  4. Step 4: Simplify right side
    20,696.30x = 364,084,139.58
  5. Step 5: Solve for x
    x = 364,084,139.58/20,696.30
  6. Step 6: Final answer
    x = 17,591.75

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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.