Home / 2,101.92-3,150.83-1,921.51

Finding the Fourth Proportional to 2,101.92, 3,150.83 and 1,921.51

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Solution

The fourth proportional to 2,101.92, 3,150.83 and 1,921.51 is: 2,880.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.92 : 3,150.83 = 1,921.51 : x
  2. Step 2: Convert to fraction form
    2,101.92/3,150.83 = 1,921.51/x
  3. Step 3: Cross multiply
    2,101.92x = 3,150.83 × 1,921.51
  4. Step 4: Simplify right side
    2,101.92x = 6,054,341.75
  5. Step 5: Solve for x
    x = 6,054,341.75/2,101.92
  6. Step 6: Final answer
    x = 2,880.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.