Home / 3,211.80-4,427.10-2,621.40

Finding the Fourth Proportional to 3,211.80, 4,427.10 and 2,621.40

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Solution

The fourth proportional to 3,211.80, 4,427.10 and 2,621.40 is: 3,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.80 : 4,427.10 = 2,621.40 : x
  2. Step 2: Convert to fraction form
    3,211.80/4,427.10 = 2,621.40/x
  3. Step 3: Cross multiply
    3,211.80x = 4,427.10 × 2,621.40
  4. Step 4: Simplify right side
    3,211.80x = 11,605,199.94
  5. Step 5: Solve for x
    x = 11,605,199.94/3,211.80
  6. Step 6: Final answer
    x = 3,613.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.