Home / 3,118.60-4,677.90-2,081.80

Finding the Fourth Proportional to 3,118.60, 4,677.90 and 2,081.80

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Solution

The fourth proportional to 3,118.60, 4,677.90 and 2,081.80 is: 3,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.60 : 4,677.90 = 2,081.80 : x
  2. Step 2: Convert to fraction form
    3,118.60/4,677.90 = 2,081.80/x
  3. Step 3: Cross multiply
    3,118.60x = 4,677.90 × 2,081.80
  4. Step 4: Simplify right side
    3,118.60x = 9,738,452.22
  5. Step 5: Solve for x
    x = 9,738,452.22/3,118.60
  6. Step 6: Final answer
    x = 3,122.70

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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.