Home / 5,422.35-8,131.40-1,911.61

Finding the Fourth Proportional to 5,422.35, 8,131.40 and 1,911.61

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Solution

The fourth proportional to 5,422.35, 8,131.40 and 1,911.61 is: 2,866.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.35 : 8,131.40 = 1,911.61 : x
  2. Step 2: Convert to fraction form
    5,422.35/8,131.40 = 1,911.61/x
  3. Step 3: Cross multiply
    5,422.35x = 8,131.40 × 1,911.61
  4. Step 4: Simplify right side
    5,422.35x = 15,544,065.55
  5. Step 5: Solve for x
    x = 15,544,065.55/5,422.35
  6. Step 6: Final answer
    x = 2,866.67

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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.