Home / 3,873.76-5,345.75-2,105.39

Finding the Fourth Proportional to 3,873.76, 5,345.75 and 2,105.39

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Solution

The fourth proportional to 3,873.76, 5,345.75 and 2,105.39 is: 2,905.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.76 : 5,345.75 = 2,105.39 : x
  2. Step 2: Convert to fraction form
    3,873.76/5,345.75 = 2,105.39/x
  3. Step 3: Cross multiply
    3,873.76x = 5,345.75 × 2,105.39
  4. Step 4: Simplify right side
    3,873.76x = 11,254,907.22
  5. Step 5: Solve for x
    x = 11,254,907.22/3,873.76
  6. Step 6: Final answer
    x = 2,905.42

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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.