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Finding the Fourth Proportional to 20,676.75, 31,015.13 and 6,825.75

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Solution

The fourth proportional to 20,676.75, 31,015.13 and 6,825.75 is: 10,238.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.75 : 31,015.13 = 6,825.75 : x
  2. Step 2: Convert to fraction form
    20,676.75/31,015.13 = 6,825.75/x
  3. Step 3: Cross multiply
    20,676.75x = 31,015.13 × 6,825.75
  4. Step 4: Simplify right side
    20,676.75x = 211,701,489.47
  5. Step 5: Solve for x
    x = 211,701,489.47/20,676.75
  6. Step 6: Final answer
    x = 10,238.63

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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.