Home / 3,915.37-5,403.14-2,122.80

Finding the Fourth Proportional to 3,915.37, 5,403.14 and 2,122.80

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Solution

The fourth proportional to 3,915.37, 5,403.14 and 2,122.80 is: 2,929.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.37 : 5,403.14 = 2,122.80 : x
  2. Step 2: Convert to fraction form
    3,915.37/5,403.14 = 2,122.80/x
  3. Step 3: Cross multiply
    3,915.37x = 5,403.14 × 2,122.80
  4. Step 4: Simplify right side
    3,915.37x = 11,469,785.59
  5. Step 5: Solve for x
    x = 11,469,785.59/3,915.37
  6. Step 6: Final answer
    x = 2,929.43

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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.