Home / 2,820.36-3,890.34-2,035.56

Finding the Fourth Proportional to 2,820.36, 3,890.34 and 2,035.56

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Solution

The fourth proportional to 2,820.36, 3,890.34 and 2,035.56 is: 2,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.36 : 3,890.34 = 2,035.56 : x
  2. Step 2: Convert to fraction form
    2,820.36/3,890.34 = 2,035.56/x
  3. Step 3: Cross multiply
    2,820.36x = 3,890.34 × 2,035.56
  4. Step 4: Simplify right side
    2,820.36x = 7,919,020.49
  5. Step 5: Solve for x
    x = 7,919,020.49/2,820.36
  6. Step 6: Final answer
    x = 2,807.80

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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.