Home / 3,879.46-5,353.67-2,111.06

Finding the Fourth Proportional to 3,879.46, 5,353.67 and 2,111.06

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Solution

The fourth proportional to 3,879.46, 5,353.67 and 2,111.06 is: 2,913.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.46 : 5,353.67 = 2,111.06 : x
  2. Step 2: Convert to fraction form
    3,879.46/5,353.67 = 2,111.06/x
  3. Step 3: Cross multiply
    3,879.46x = 5,353.67 × 2,111.06
  4. Step 4: Simplify right side
    3,879.46x = 11,301,908.03
  5. Step 5: Solve for x
    x = 11,301,908.03/3,879.46
  6. Step 6: Final answer
    x = 2,913.27

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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.