Home / 3,999.63-5,518.98-2,231.31

Finding the Fourth Proportional to 3,999.63, 5,518.98 and 2,231.31

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Solution

The fourth proportional to 3,999.63, 5,518.98 and 2,231.31 is: 3,078.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.63 : 5,518.98 = 2,231.31 : x
  2. Step 2: Convert to fraction form
    3,999.63/5,518.98 = 2,231.31/x
  3. Step 3: Cross multiply
    3,999.63x = 5,518.98 × 2,231.31
  4. Step 4: Simplify right side
    3,999.63x = 12,314,555.26
  5. Step 5: Solve for x
    x = 12,314,555.26/3,999.63
  6. Step 6: Final answer
    x = 3,078.92

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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.