Home / 3,945.87-5,918.91-1,866.85

Finding the Fourth Proportional to 3,945.87, 5,918.91 and 1,866.85

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Solution

The fourth proportional to 3,945.87, 5,918.91 and 1,866.85 is: 2,800.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.87 : 5,918.91 = 1,866.85 : x
  2. Step 2: Convert to fraction form
    3,945.87/5,918.91 = 1,866.85/x
  3. Step 3: Cross multiply
    3,945.87x = 5,918.91 × 1,866.85
  4. Step 4: Simplify right side
    3,945.87x = 11,049,695.34
  5. Step 5: Solve for x
    x = 11,049,695.34/3,945.87
  6. Step 6: Final answer
    x = 2,800.32

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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.