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Finding the Fourth Proportional to 13,879.77, 20,819.80 and 11,102.88

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Solution

The fourth proportional to 13,879.77, 20,819.80 and 11,102.88 is: 16,654.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.77 : 20,819.80 = 11,102.88 : x
  2. Step 2: Convert to fraction form
    13,879.77/20,819.80 = 11,102.88/x
  3. Step 3: Cross multiply
    13,879.77x = 20,819.80 × 11,102.88
  4. Step 4: Simplify right side
    13,879.77x = 231,159,741.02
  5. Step 5: Solve for x
    x = 231,159,741.02/13,879.77
  6. Step 6: Final answer
    x = 16,654.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.