Home / 2,776.92-3,826.88-1,989.60

Finding the Fourth Proportional to 2,776.92, 3,826.88 and 1,989.60

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Solution

The fourth proportional to 2,776.92, 3,826.88 and 1,989.60 is: 2,741.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,776.92 : 3,826.88 = 1,989.60 : x
  2. Step 2: Convert to fraction form
    2,776.92/3,826.88 = 1,989.60/x
  3. Step 3: Cross multiply
    2,776.92x = 3,826.88 × 1,989.60
  4. Step 4: Simplify right side
    2,776.92x = 7,613,950.50
  5. Step 5: Solve for x
    x = 7,613,950.50/2,776.92
  6. Step 6: Final answer
    x = 2,741.87

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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.