Home / 3,933.85-5,428.50-2,165.11

Finding the Fourth Proportional to 3,933.85, 5,428.50 and 2,165.11

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Solution

The fourth proportional to 3,933.85, 5,428.50 and 2,165.11 is: 2,987.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.85 : 5,428.50 = 2,165.11 : x
  2. Step 2: Convert to fraction form
    3,933.85/5,428.50 = 2,165.11/x
  3. Step 3: Cross multiply
    3,933.85x = 5,428.50 × 2,165.11
  4. Step 4: Simplify right side
    3,933.85x = 11,753,313.21
  5. Step 5: Solve for x
    x = 11,753,313.21/3,933.85
  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.