Home / 20,639.99-30,958.83-12,743.97

Finding the Fourth Proportional to 20,639.99, 30,958.83 and 12,743.97

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Solution

The fourth proportional to 20,639.99, 30,958.83 and 12,743.97 is: 19,115.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.99 : 30,958.83 = 12,743.97 : x
  2. Step 2: Convert to fraction form
    20,639.99/30,958.83 = 12,743.97/x
  3. Step 3: Cross multiply
    20,639.99x = 30,958.83 × 12,743.97
  4. Step 4: Simplify right side
    20,639.99x = 394,538,400.76
  5. Step 5: Solve for x
    x = 394,538,400.76/20,639.99
  6. Step 6: Final answer
    x = 19,115.25

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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.