Home / 20,991.89-31,489.63-5,999.27

Finding the Fourth Proportional to 20,991.89, 31,489.63 and 5,999.27

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Solution

The fourth proportional to 20,991.89, 31,489.63 and 5,999.27 is: 8,999.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.89 : 31,489.63 = 5,999.27 : x
  2. Step 2: Convert to fraction form
    20,991.89/31,489.63 = 5,999.27/x
  3. Step 3: Cross multiply
    20,991.89x = 31,489.63 × 5,999.27
  4. Step 4: Simplify right side
    20,991.89x = 188,914,620.12
  5. Step 5: Solve for x
    x = 188,914,620.12/20,991.89
  6. Step 6: Final answer
    x = 8,999.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.