Home / 3,571.56-4,928.88-1,999.80

Finding the Fourth Proportional to 3,571.56, 4,928.88 and 1,999.80

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Solution

The fourth proportional to 3,571.56, 4,928.88 and 1,999.80 is: 2,759.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.56 : 4,928.88 = 1,999.80 : x
  2. Step 2: Convert to fraction form
    3,571.56/4,928.88 = 1,999.80/x
  3. Step 3: Cross multiply
    3,571.56x = 4,928.88 × 1,999.80
  4. Step 4: Simplify right side
    3,571.56x = 9,856,774.22
  5. Step 5: Solve for x
    x = 9,856,774.22/3,571.56
  6. Step 6: Final answer
    x = 2,759.80

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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.