Home / 3,933.88-5,428.65-2,165.45

Finding the Fourth Proportional to 3,933.88, 5,428.65 and 2,165.45

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Solution

The fourth proportional to 3,933.88, 5,428.65 and 2,165.45 is: 2,988.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.88 : 5,428.65 = 2,165.45 : x
  2. Step 2: Convert to fraction form
    3,933.88/5,428.65 = 2,165.45/x
  3. Step 3: Cross multiply
    3,933.88x = 5,428.65 × 2,165.45
  4. Step 4: Simplify right side
    3,933.88x = 11,755,463.38
  5. Step 5: Solve for x
    x = 11,755,463.38/3,933.88
  6. Step 6: Final answer
    x = 2,988.26

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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.