Home / 20,991.45-31,491.33-5,998.70

Finding the Fourth Proportional to 20,991.45, 31,491.33 and 5,998.70

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Solution

The fourth proportional to 20,991.45, 31,491.33 and 5,998.70 is: 8,999.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.45 : 31,491.33 = 5,998.70 : x
  2. Step 2: Convert to fraction form
    20,991.45/31,491.33 = 5,998.70/x
  3. Step 3: Cross multiply
    20,991.45x = 31,491.33 × 5,998.70
  4. Step 4: Simplify right side
    20,991.45x = 188,906,853.82
  5. Step 5: Solve for x
    x = 188,906,853.82/20,991.45
  6. Step 6: Final answer
    x = 8,999.23

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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.