Home / 3,933.59-5,428.40-2,165.31

Finding the Fourth Proportional to 3,933.59, 5,428.40 and 2,165.31

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Solution

The fourth proportional to 3,933.59, 5,428.40 and 2,165.31 is: 2,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.59 : 5,428.40 = 2,165.31 : x
  2. Step 2: Convert to fraction form
    3,933.59/5,428.40 = 2,165.31/x
  3. Step 3: Cross multiply
    3,933.59x = 5,428.40 × 2,165.31
  4. Step 4: Simplify right side
    3,933.59x = 11,754,157.98
  5. Step 5: Solve for x
    x = 11,754,157.98/3,933.59
  6. Step 6: Final answer
    x = 2,988.15

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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.