Home / 20,736.75-31,109.99-6,885.75

Finding the Fourth Proportional to 20,736.75, 31,109.99 and 6,885.75

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Solution

The fourth proportional to 20,736.75, 31,109.99 and 6,885.75 is: 10,330.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.75 : 31,109.99 = 6,885.75 : x
  2. Step 2: Convert to fraction form
    20,736.75/31,109.99 = 6,885.75/x
  3. Step 3: Cross multiply
    20,736.75x = 31,109.99 × 6,885.75
  4. Step 4: Simplify right side
    20,736.75x = 214,215,613.64
  5. Step 5: Solve for x
    x = 214,215,613.64/20,736.75
  6. Step 6: Final answer
    x = 10,330.24

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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.