Home / 3,923.99-5,415.09-2,131.46

Finding the Fourth Proportional to 3,923.99, 5,415.09 and 2,131.46

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Solution

The fourth proportional to 3,923.99, 5,415.09 and 2,131.46 is: 2,941.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.99 : 5,415.09 = 2,131.46 : x
  2. Step 2: Convert to fraction form
    3,923.99/5,415.09 = 2,131.46/x
  3. Step 3: Cross multiply
    3,923.99x = 5,415.09 × 2,131.46
  4. Step 4: Simplify right side
    3,923.99x = 11,542,044.96
  5. Step 5: Solve for x
    x = 11,542,044.96/3,923.99
  6. Step 6: Final answer
    x = 2,941.40

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Half scale
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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.