Home / 3,933.40-5,428.13-2,165.02

Finding the Fourth Proportional to 3,933.40, 5,428.13 and 2,165.02

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Solution

The fourth proportional to 3,933.40, 5,428.13 and 2,165.02 is: 2,987.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.40 : 5,428.13 = 2,165.02 : x
  2. Step 2: Convert to fraction form
    3,933.40/5,428.13 = 2,165.02/x
  3. Step 3: Cross multiply
    3,933.40x = 5,428.13 × 2,165.02
  4. Step 4: Simplify right side
    3,933.40x = 11,751,975.44
  5. Step 5: Solve for x
    x = 11,751,975.44/3,933.40
  6. Step 6: Final answer
    x = 2,987.74

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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.