Home / 13,682.12-20,505.90-11,819.72

Finding the Fourth Proportional to 13,682.12, 20,505.90 and 11,819.72

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Solution

The fourth proportional to 13,682.12, 20,505.90 and 11,819.72 is: 17,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.12 : 20,505.90 = 11,819.72 : x
  2. Step 2: Convert to fraction form
    13,682.12/20,505.90 = 11,819.72/x
  3. Step 3: Cross multiply
    13,682.12x = 20,505.90 × 11,819.72
  4. Step 4: Simplify right side
    13,682.12x = 242,373,996.35
  5. Step 5: Solve for x
    x = 242,373,996.35/13,682.12
  6. Step 6: Final answer
    x = 17,714.65

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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.