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Finding the Fourth Proportional to 20,650.63, 28,496.95 and 11,697.95

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Solution

The fourth proportional to 20,650.63, 28,496.95 and 11,697.95 is: 16,142.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.63 : 28,496.95 = 11,697.95 : x
  2. Step 2: Convert to fraction form
    20,650.63/28,496.95 = 11,697.95/x
  3. Step 3: Cross multiply
    20,650.63x = 28,496.95 × 11,697.95
  4. Step 4: Simplify right side
    20,650.63x = 333,355,982.12
  5. Step 5: Solve for x
    x = 333,355,982.12/20,650.63
  6. Step 6: Final answer
    x = 16,142.65

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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.