Home / 2,820.20-3,890.57-1,825.80

Finding the Fourth Proportional to 2,820.20, 3,890.57 and 1,825.80

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Solution

The fourth proportional to 2,820.20, 3,890.57 and 1,825.80 is: 2,518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.20 : 3,890.57 = 1,825.80 : x
  2. Step 2: Convert to fraction form
    2,820.20/3,890.57 = 1,825.80/x
  3. Step 3: Cross multiply
    2,820.20x = 3,890.57 × 1,825.80
  4. Step 4: Simplify right side
    2,820.20x = 7,103,407.27
  5. Step 5: Solve for x
    x = 7,103,407.27/2,820.20
  6. Step 6: Final answer
    x = 2,518.76

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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.