Home / 2,620.12-3,612.42-1,991.32

Finding the Fourth Proportional to 2,620.12, 3,612.42 and 1,991.32

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Solution

The fourth proportional to 2,620.12, 3,612.42 and 1,991.32 is: 2,745.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.12 : 3,612.42 = 1,991.32 : x
  2. Step 2: Convert to fraction form
    2,620.12/3,612.42 = 1,991.32/x
  3. Step 3: Cross multiply
    2,620.12x = 3,612.42 × 1,991.32
  4. Step 4: Simplify right side
    2,620.12x = 7,193,484.19
  5. Step 5: Solve for x
    x = 7,193,484.19/2,620.12
  6. Step 6: Final answer
    x = 2,745.48

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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.