Home / 3,933.72-5,428.54-2,165.39

Finding the Fourth Proportional to 3,933.72, 5,428.54 and 2,165.39

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Solution

The fourth proportional to 3,933.72, 5,428.54 and 2,165.39 is: 2,988.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.72 : 5,428.54 = 2,165.39 : x
  2. Step 2: Convert to fraction form
    3,933.72/5,428.54 = 2,165.39/x
  3. Step 3: Cross multiply
    3,933.72x = 5,428.54 × 2,165.39
  4. Step 4: Simplify right side
    3,933.72x = 11,754,906.23
  5. Step 5: Solve for x
    x = 11,754,906.23/3,933.72
  6. Step 6: Final answer
    x = 2,988.24

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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.