Home / 3,999.12-5,519.40-2,883.72

Finding the Fourth Proportional to 3,999.12, 5,519.40 and 2,883.72

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Solution

The fourth proportional to 3,999.12, 5,519.40 and 2,883.72 is: 3,979.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.12 : 5,519.40 = 2,883.72 : x
  2. Step 2: Convert to fraction form
    3,999.12/5,519.40 = 2,883.72/x
  3. Step 3: Cross multiply
    3,999.12x = 5,519.40 × 2,883.72
  4. Step 4: Simplify right side
    3,999.12x = 15,916,404.17
  5. Step 5: Solve for x
    x = 15,916,404.17/3,999.12
  6. Step 6: Final answer
    x = 3,979.98

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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.