Home / 2,821.20-3,894.36-2,036.30

Finding the Fourth Proportional to 2,821.20, 3,894.36 and 2,036.30

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Solution

The fourth proportional to 2,821.20, 3,894.36 and 2,036.30 is: 2,810.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.20 : 3,894.36 = 2,036.30 : x
  2. Step 2: Convert to fraction form
    2,821.20/3,894.36 = 2,036.30/x
  3. Step 3: Cross multiply
    2,821.20x = 3,894.36 × 2,036.30
  4. Step 4: Simplify right side
    2,821.20x = 7,930,085.27
  5. Step 5: Solve for x
    x = 7,930,085.27/2,821.20
  6. Step 6: Final answer
    x = 2,810.89

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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.