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Finding the Fourth Proportional to 3,999.64, 5,557.81 and 3,950.68

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Solution

The fourth proportional to 3,999.64, 5,557.81 and 3,950.68 is: 5,489.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.64 : 5,557.81 = 3,950.68 : x
  2. Step 2: Convert to fraction form
    3,999.64/5,557.81 = 3,950.68/x
  3. Step 3: Cross multiply
    3,999.64x = 5,557.81 × 3,950.68
  4. Step 4: Simplify right side
    3,999.64x = 21,957,128.81
  5. Step 5: Solve for x
    x = 21,957,128.81/3,999.64
  6. Step 6: Final answer
    x = 5,489.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.