Home / 5,453.20-8,179.80-1,991.80

Finding the Fourth Proportional to 5,453.20, 8,179.80 and 1,991.80

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Solution

The fourth proportional to 5,453.20, 8,179.80 and 1,991.80 is: 2,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,453.20 : 8,179.80 = 1,991.80 : x
  2. Step 2: Convert to fraction form
    5,453.20/8,179.80 = 1,991.80/x
  3. Step 3: Cross multiply
    5,453.20x = 8,179.80 × 1,991.80
  4. Step 4: Simplify right side
    5,453.20x = 16,292,525.64
  5. Step 5: Solve for x
    x = 16,292,525.64/5,453.20
  6. Step 6: Final answer
    x = 2,987.70

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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.