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Finding the Fourth Proportional to 20,193.90, 27,868.90 and 12,236.88

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Solution

The fourth proportional to 20,193.90, 27,868.90 and 12,236.88 is: 16,887.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,193.90 : 27,868.90 = 12,236.88 : x
  2. Step 2: Convert to fraction form
    20,193.90/27,868.90 = 12,236.88/x
  3. Step 3: Cross multiply
    20,193.90x = 27,868.90 × 12,236.88
  4. Step 4: Simplify right side
    20,193.90x = 341,028,385.03
  5. Step 5: Solve for x
    x = 341,028,385.03/20,193.90
  6. Step 6: Final answer
    x = 16,887.69

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1.5x scale

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.