Home / 2,118.60-3,168.90-1,900.80

Finding the Fourth Proportional to 2,118.60, 3,168.90 and 1,900.80

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Solution

The fourth proportional to 2,118.60, 3,168.90 and 1,900.80 is: 2,843.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.60 : 3,168.90 = 1,900.80 : x
  2. Step 2: Convert to fraction form
    2,118.60/3,168.90 = 1,900.80/x
  3. Step 3: Cross multiply
    2,118.60x = 3,168.90 × 1,900.80
  4. Step 4: Simplify right side
    2,118.60x = 6,023,445.12
  5. Step 5: Solve for x
    x = 6,023,445.12/2,118.60
  6. Step 6: Final answer
    x = 2,843.13

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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.