Home / 20,380.44-28,113.06-12,814.78

Finding the Fourth Proportional to 20,380.44, 28,113.06 and 12,814.78

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Solution

The fourth proportional to 20,380.44, 28,113.06 and 12,814.78 is: 17,676.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.44 : 28,113.06 = 12,814.78 : x
  2. Step 2: Convert to fraction form
    20,380.44/28,113.06 = 12,814.78/x
  3. Step 3: Cross multiply
    20,380.44x = 28,113.06 × 12,814.78
  4. Step 4: Simplify right side
    20,380.44x = 360,262,474.39
  5. Step 5: Solve for x
    x = 360,262,474.39/20,380.44
  6. Step 6: Final answer
    x = 17,676.88

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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.