Home / 3,999.50-5,519.57-2,321.45

Finding the Fourth Proportional to 3,999.50, 5,519.57 and 2,321.45

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Solution

The fourth proportional to 3,999.50, 5,519.57 and 2,321.45 is: 3,203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.50 : 5,519.57 = 2,321.45 : x
  2. Step 2: Convert to fraction form
    3,999.50/5,519.57 = 2,321.45/x
  3. Step 3: Cross multiply
    3,999.50x = 5,519.57 × 2,321.45
  4. Step 4: Simplify right side
    3,999.50x = 12,813,405.78
  5. Step 5: Solve for x
    x = 12,813,405.78/3,999.50
  6. Step 6: Final answer
    x = 3,203.75

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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.