Home / 2,825.68-3,896.66-2,155.20

Finding the Fourth Proportional to 2,825.68, 3,896.66 and 2,155.20

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Solution

The fourth proportional to 2,825.68, 3,896.66 and 2,155.20 is: 2,972.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.68 : 3,896.66 = 2,155.20 : x
  2. Step 2: Convert to fraction form
    2,825.68/3,896.66 = 2,155.20/x
  3. Step 3: Cross multiply
    2,825.68x = 3,896.66 × 2,155.20
  4. Step 4: Simplify right side
    2,825.68x = 8,398,081.63
  5. Step 5: Solve for x
    x = 8,398,081.63/2,825.68
  6. Step 6: Final answer
    x = 2,972.06

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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.