Home / 3,571.09-4,928.13-1,999.20

Finding the Fourth Proportional to 3,571.09, 4,928.13 and 1,999.20

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Solution

The fourth proportional to 3,571.09, 4,928.13 and 1,999.20 is: 2,758.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.09 : 4,928.13 = 1,999.20 : x
  2. Step 2: Convert to fraction form
    3,571.09/4,928.13 = 1,999.20/x
  3. Step 3: Cross multiply
    3,571.09x = 4,928.13 × 1,999.20
  4. Step 4: Simplify right side
    3,571.09x = 9,852,317.50
  5. Step 5: Solve for x
    x = 9,852,317.50/3,571.09
  6. Step 6: Final answer
    x = 2,758.91

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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.