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Finding the Fourth Proportional to 20,949.52, 28,910.64 and 11,518

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Solution

The fourth proportional to 20,949.52, 28,910.64 and 11,518 is: 15,895.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.52 : 28,910.64 = 11,518 : x
  2. Step 2: Convert to fraction form
    20,949.52/28,910.64 = 11,518/x
  3. Step 3: Cross multiply
    20,949.52x = 28,910.64 × 11,518
  4. Step 4: Simplify right side
    20,949.52x = 332,992,751.52
  5. Step 5: Solve for x
    x = 332,992,751.52/20,949.52
  6. Step 6: Final answer
    x = 15,895.01

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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.