Home / 3,776.45-5,211.57-2,120.45

Finding the Fourth Proportional to 3,776.45, 5,211.57 and 2,120.45

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Solution

The fourth proportional to 3,776.45, 5,211.57 and 2,120.45 is: 2,926.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,776.45 : 5,211.57 = 2,120.45 : x
  2. Step 2: Convert to fraction form
    3,776.45/5,211.57 = 2,120.45/x
  3. Step 3: Cross multiply
    3,776.45x = 5,211.57 × 2,120.45
  4. Step 4: Simplify right side
    3,776.45x = 11,050,847.55
  5. Step 5: Solve for x
    x = 11,050,847.55/3,776.45
  6. Step 6: Final answer
    x = 2,926.26

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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.