Home / 20,295.82-27,990.09-12,742.85

Finding the Fourth Proportional to 20,295.82, 27,990.09 and 12,742.85

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Solution

The fourth proportional to 20,295.82, 27,990.09 and 12,742.85 is: 17,573.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.82 : 27,990.09 = 12,742.85 : x
  2. Step 2: Convert to fraction form
    20,295.82/27,990.09 = 12,742.85/x
  3. Step 3: Cross multiply
    20,295.82x = 27,990.09 × 12,742.85
  4. Step 4: Simplify right side
    20,295.82x = 356,673,588.33
  5. Step 5: Solve for x
    x = 356,673,588.33/20,295.82
  6. Step 6: Final answer
    x = 17,573.75

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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.