Home / 3,873.82-5,345.88-2,105.45

Finding the Fourth Proportional to 3,873.82, 5,345.88 and 2,105.45

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Solution

The fourth proportional to 3,873.82, 5,345.88 and 2,105.45 is: 2,905.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.82 : 5,345.88 = 2,105.45 : x
  2. Step 2: Convert to fraction form
    3,873.82/5,345.88 = 2,105.45/x
  3. Step 3: Cross multiply
    3,873.82x = 5,345.88 × 2,105.45
  4. Step 4: Simplify right side
    3,873.82x = 11,255,483.05
  5. Step 5: Solve for x
    x = 11,255,483.05/3,873.82
  6. Step 6: Final answer
    x = 2,905.53

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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.