Home / 3,879.47-5,353.66-2,111.08

Finding the Fourth Proportional to 3,879.47, 5,353.66 and 2,111.08

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Solution

The fourth proportional to 3,879.47, 5,353.66 and 2,111.08 is: 2,913.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.47 : 5,353.66 = 2,111.08 : x
  2. Step 2: Convert to fraction form
    3,879.47/5,353.66 = 2,111.08/x
  3. Step 3: Cross multiply
    3,879.47x = 5,353.66 × 2,111.08
  4. Step 4: Simplify right side
    3,879.47x = 11,302,004.55
  5. Step 5: Solve for x
    x = 11,302,004.55/3,879.47
  6. Step 6: Final answer
    x = 2,913.29

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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.