Home / 20,078.82-27,709.80-12,120.94

Finding the Fourth Proportional to 20,078.82, 27,709.80 and 12,120.94

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Solution

The fourth proportional to 20,078.82, 27,709.80 and 12,120.94 is: 16,727.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.82 : 27,709.80 = 12,120.94 : x
  2. Step 2: Convert to fraction form
    20,078.82/27,709.80 = 12,120.94/x
  3. Step 3: Cross multiply
    20,078.82x = 27,709.80 × 12,120.94
  4. Step 4: Simplify right side
    20,078.82x = 335,868,823.21
  5. Step 5: Solve for x
    x = 335,868,823.21/20,078.82
  6. Step 6: Final answer
    x = 16,727.52

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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.