Home / 3,999.36-5,512.80-2,818.56

Finding the Fourth Proportional to 3,999.36, 5,512.80 and 2,818.56

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Solution

The fourth proportional to 3,999.36, 5,512.80 and 2,818.56 is: 3,885.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.36 : 5,512.80 = 2,818.56 : x
  2. Step 2: Convert to fraction form
    3,999.36/5,512.80 = 2,818.56/x
  3. Step 3: Cross multiply
    3,999.36x = 5,512.80 × 2,818.56
  4. Step 4: Simplify right side
    3,999.36x = 15,538,157.57
  5. Step 5: Solve for x
    x = 15,538,157.57/3,999.36
  6. Step 6: Final answer
    x = 3,885.16

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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.