Home / 5,454.36-8,181.90-1,990.68

Finding the Fourth Proportional to 5,454.36, 8,181.90 and 1,990.68

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Solution

The fourth proportional to 5,454.36, 8,181.90 and 1,990.68 is: 2,986.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,454.36 : 8,181.90 = 1,990.68 : x
  2. Step 2: Convert to fraction form
    5,454.36/8,181.90 = 1,990.68/x
  3. Step 3: Cross multiply
    5,454.36x = 8,181.90 × 1,990.68
  4. Step 4: Simplify right side
    5,454.36x = 16,287,544.69
  5. Step 5: Solve for x
    x = 16,287,544.69/5,454.36
  6. Step 6: Final answer
    x = 2,986.15

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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.