Home / 2,821.17-3,891.67-1,983.16

Finding the Fourth Proportional to 2,821.17, 3,891.67 and 1,983.16

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Solution

The fourth proportional to 2,821.17, 3,891.67 and 1,983.16 is: 2,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.17 : 3,891.67 = 1,983.16 : x
  2. Step 2: Convert to fraction form
    2,821.17/3,891.67 = 1,983.16/x
  3. Step 3: Cross multiply
    2,821.17x = 3,891.67 × 1,983.16
  4. Step 4: Simplify right side
    2,821.17x = 7,717,804.28
  5. Step 5: Solve for x
    x = 7,717,804.28/2,821.17
  6. Step 6: Final answer
    x = 2,735.68

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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.