Home / 5,453.40-8,181.18-1,990.56

Finding the Fourth Proportional to 5,453.40, 8,181.18 and 1,990.56

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Solution

The fourth proportional to 5,453.40, 8,181.18 and 1,990.56 is: 2,986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,453.40 : 8,181.18 = 1,990.56 : x
  2. Step 2: Convert to fraction form
    5,453.40/8,181.18 = 1,990.56/x
  3. Step 3: Cross multiply
    5,453.40x = 8,181.18 × 1,990.56
  4. Step 4: Simplify right side
    5,453.40x = 16,285,129.66
  5. Step 5: Solve for x
    x = 16,285,129.66/5,453.40
  6. Step 6: Final answer
    x = 2,986.23

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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.