Home / 2,816-3,886.08-1,621.20

Finding the Fourth Proportional to 2,816, 3,886.08 and 1,621.20

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Solution

The fourth proportional to 2,816, 3,886.08 and 1,621.20 is: 2,237.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816 : 3,886.08 = 1,621.20 : x
  2. Step 2: Convert to fraction form
    2,816/3,886.08 = 1,621.20/x
  3. Step 3: Cross multiply
    2,816x = 3,886.08 × 1,621.20
  4. Step 4: Simplify right side
    2,816x = 6,300,112.90
  5. Step 5: Solve for x
    x = 6,300,112.90/2,816
  6. Step 6: Final answer
    x = 2,237.26

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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.