Home / 2,211.80-3,312.30-2,114.60

Finding the Fourth Proportional to 2,211.80, 3,312.30 and 2,114.60

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Solution

The fourth proportional to 2,211.80, 3,312.30 and 2,114.60 is: 3,166.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.80 : 3,312.30 = 2,114.60 : x
  2. Step 2: Convert to fraction form
    2,211.80/3,312.30 = 2,114.60/x
  3. Step 3: Cross multiply
    2,211.80x = 3,312.30 × 2,114.60
  4. Step 4: Simplify right side
    2,211.80x = 7,004,189.58
  5. Step 5: Solve for x
    x = 7,004,189.58/2,211.80
  6. Step 6: Final answer
    x = 3,166.74

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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.