Home / 2,115.12-3,171.06-2,011.05

Finding the Fourth Proportional to 2,115.12, 3,171.06 and 2,011.05

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Solution

The fourth proportional to 2,115.12, 3,171.06 and 2,011.05 is: 3,015.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.12 : 3,171.06 = 2,011.05 : x
  2. Step 2: Convert to fraction form
    2,115.12/3,171.06 = 2,011.05/x
  3. Step 3: Cross multiply
    2,115.12x = 3,171.06 × 2,011.05
  4. Step 4: Simplify right side
    2,115.12x = 6,377,160.21
  5. Step 5: Solve for x
    x = 6,377,160.21/2,115.12
  6. Step 6: Final answer
    x = 3,015.03

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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.