Home / 3,992.20-5,509.36-2,291.02

Finding the Fourth Proportional to 3,992.20, 5,509.36 and 2,291.02

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Solution

The fourth proportional to 3,992.20, 5,509.36 and 2,291.02 is: 3,161.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.20 : 5,509.36 = 2,291.02 : x
  2. Step 2: Convert to fraction form
    3,992.20/5,509.36 = 2,291.02/x
  3. Step 3: Cross multiply
    3,992.20x = 5,509.36 × 2,291.02
  4. Step 4: Simplify right side
    3,992.20x = 12,622,025.11
  5. Step 5: Solve for x
    x = 12,622,025.11/3,992.20
  6. Step 6: Final answer
    x = 3,161.67

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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.