Home / 2,169.12-2,992.68-1,383.42

Finding the Fourth Proportional to 2,169.12, 2,992.68 and 1,383.42

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Solution

The fourth proportional to 2,169.12, 2,992.68 and 1,383.42 is: 1,908.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.12 : 2,992.68 = 1,383.42 : x
  2. Step 2: Convert to fraction form
    2,169.12/2,992.68 = 1,383.42/x
  3. Step 3: Cross multiply
    2,169.12x = 2,992.68 × 1,383.42
  4. Step 4: Simplify right side
    2,169.12x = 4,140,133.37
  5. Step 5: Solve for x
    x = 4,140,133.37/2,169.12
  6. Step 6: Final answer
    x = 1,908.67

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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.