Home / 2,800.12-3,863.58-1,621.12

Finding the Fourth Proportional to 2,800.12, 3,863.58 and 1,621.12

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Solution

The fourth proportional to 2,800.12, 3,863.58 and 1,621.12 is: 2,236.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.12 : 3,863.58 = 1,621.12 : x
  2. Step 2: Convert to fraction form
    2,800.12/3,863.58 = 1,621.12/x
  3. Step 3: Cross multiply
    2,800.12x = 3,863.58 × 1,621.12
  4. Step 4: Simplify right side
    2,800.12x = 6,263,326.81
  5. Step 5: Solve for x
    x = 6,263,326.81/2,800.12
  6. Step 6: Final answer
    x = 2,236.81

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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.