Home / 5,453.45-8,181.38-1,990.70

Finding the Fourth Proportional to 5,453.45, 8,181.38 and 1,990.70

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Solution

The fourth proportional to 5,453.45, 8,181.38 and 1,990.70 is: 2,986.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,453.45 : 8,181.38 = 1,990.70 : x
  2. Step 2: Convert to fraction form
    5,453.45/8,181.38 = 1,990.70/x
  3. Step 3: Cross multiply
    5,453.45x = 8,181.38 × 1,990.70
  4. Step 4: Simplify right side
    5,453.45x = 16,286,622.31
  5. Step 5: Solve for x
    x = 16,286,622.31/5,453.45
  6. Step 6: Final answer
    x = 2,986.48

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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.