Home / 2,812.11-3,879.77-1,818.64

Finding the Fourth Proportional to 2,812.11, 3,879.77 and 1,818.64

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Solution

The fourth proportional to 2,812.11, 3,879.77 and 1,818.64 is: 2,509.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.11 : 3,879.77 = 1,818.64 : x
  2. Step 2: Convert to fraction form
    2,812.11/3,879.77 = 1,818.64/x
  3. Step 3: Cross multiply
    2,812.11x = 3,879.77 × 1,818.64
  4. Step 4: Simplify right side
    2,812.11x = 7,055,912.34
  5. Step 5: Solve for x
    x = 7,055,912.34/2,812.11
  6. Step 6: Final answer
    x = 2,509.12

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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.