Home / 3,381.20-4,665.94-1,965

Finding the Fourth Proportional to 3,381.20, 4,665.94 and 1,965

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Solution

The fourth proportional to 3,381.20, 4,665.94 and 1,965 is: 2,711.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.20 : 4,665.94 = 1,965 : x
  2. Step 2: Convert to fraction form
    3,381.20/4,665.94 = 1,965/x
  3. Step 3: Cross multiply
    3,381.20x = 4,665.94 × 1,965
  4. Step 4: Simplify right side
    3,381.20x = 9,168,572.10
  5. Step 5: Solve for x
    x = 9,168,572.10/3,381.20
  6. Step 6: Final answer
    x = 2,711.63

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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.