Home / 3,999.35-5,521.33-2,807.99

Finding the Fourth Proportional to 3,999.35, 5,521.33 and 2,807.99

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Solution

The fourth proportional to 3,999.35, 5,521.33 and 2,807.99 is: 3,876.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.35 : 5,521.33 = 2,807.99 : x
  2. Step 2: Convert to fraction form
    3,999.35/5,521.33 = 2,807.99/x
  3. Step 3: Cross multiply
    3,999.35x = 5,521.33 × 2,807.99
  4. Step 4: Simplify right side
    3,999.35x = 15,503,839.43
  5. Step 5: Solve for x
    x = 15,503,839.43/3,999.35
  6. Step 6: Final answer
    x = 3,876.59

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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.