Home / 5,454.40-8,182.68-1,991.56

Finding the Fourth Proportional to 5,454.40, 8,182.68 and 1,991.56

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Solution

The fourth proportional to 5,454.40, 8,182.68 and 1,991.56 is: 2,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,454.40 : 8,182.68 = 1,991.56 : x
  2. Step 2: Convert to fraction form
    5,454.40/8,182.68 = 1,991.56/x
  3. Step 3: Cross multiply
    5,454.40x = 8,182.68 × 1,991.56
  4. Step 4: Simplify right side
    5,454.40x = 16,296,298.18
  5. Step 5: Solve for x
    x = 16,296,298.18/5,454.40
  6. Step 6: Final answer
    x = 2,987.73

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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.