Home / 2,856.30-3,936.99-1,911.77

Finding the Fourth Proportional to 2,856.30, 3,936.99 and 1,911.77

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Solution

The fourth proportional to 2,856.30, 3,936.99 and 1,911.77 is: 2,635.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.30 : 3,936.99 = 1,911.77 : x
  2. Step 2: Convert to fraction form
    2,856.30/3,936.99 = 1,911.77/x
  3. Step 3: Cross multiply
    2,856.30x = 3,936.99 × 1,911.77
  4. Step 4: Simplify right side
    2,856.30x = 7,526,599.69
  5. Step 5: Solve for x
    x = 7,526,599.69/2,856.30
  6. Step 6: Final answer
    x = 2,635.09

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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.