Home / 3,873.60-5,345.52-2,105.21

Finding the Fourth Proportional to 3,873.60, 5,345.52 and 2,105.21

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Solution

The fourth proportional to 3,873.60, 5,345.52 and 2,105.21 is: 2,905.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.60 : 5,345.52 = 2,105.21 : x
  2. Step 2: Convert to fraction form
    3,873.60/5,345.52 = 2,105.21/x
  3. Step 3: Cross multiply
    3,873.60x = 5,345.52 × 2,105.21
  4. Step 4: Simplify right side
    3,873.60x = 11,253,415.43
  5. Step 5: Solve for x
    x = 11,253,415.43/3,873.60
  6. Step 6: Final answer
    x = 2,905.16

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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.