Home / 3,817.71-5,268.51-2,139.21

Finding the Fourth Proportional to 3,817.71, 5,268.51 and 2,139.21

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Solution

The fourth proportional to 3,817.71, 5,268.51 and 2,139.21 is: 2,952.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.71 : 5,268.51 = 2,139.21 : x
  2. Step 2: Convert to fraction form
    3,817.71/5,268.51 = 2,139.21/x
  3. Step 3: Cross multiply
    3,817.71x = 5,268.51 × 2,139.21
  4. Step 4: Simplify right side
    3,817.71x = 11,270,449.28
  5. Step 5: Solve for x
    x = 11,270,449.28/3,817.71
  6. Step 6: Final answer
    x = 2,952.15

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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.