Home / 2,971.36-4,100.96-2,840.12

Finding the Fourth Proportional to 2,971.36, 4,100.96 and 2,840.12

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Solution

The fourth proportional to 2,971.36, 4,100.96 and 2,840.12 is: 3,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.36 : 4,100.96 = 2,840.12 : x
  2. Step 2: Convert to fraction form
    2,971.36/4,100.96 = 2,840.12/x
  3. Step 3: Cross multiply
    2,971.36x = 4,100.96 × 2,840.12
  4. Step 4: Simplify right side
    2,971.36x = 11,647,218.52
  5. Step 5: Solve for x
    x = 11,647,218.52/2,971.36
  6. Step 6: Final answer
    x = 3,919.83

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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.