Home / 3,933.68-5,428.50-2,165.28

Finding the Fourth Proportional to 3,933.68, 5,428.50 and 2,165.28

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Solution

The fourth proportional to 3,933.68, 5,428.50 and 2,165.28 is: 2,988.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.68 : 5,428.50 = 2,165.28 : x
  2. Step 2: Convert to fraction form
    3,933.68/5,428.50 = 2,165.28/x
  3. Step 3: Cross multiply
    3,933.68x = 5,428.50 × 2,165.28
  4. Step 4: Simplify right side
    3,933.68x = 11,754,222.48
  5. Step 5: Solve for x
    x = 11,754,222.48/3,933.68
  6. Step 6: Final answer
    x = 2,988.10

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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.