Home / 20,917.23-31,375.63-5,122.33

Finding the Fourth Proportional to 20,917.23, 31,375.63 and 5,122.33

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Solution

The fourth proportional to 20,917.23, 31,375.63 and 5,122.33 is: 7,683.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.23 : 31,375.63 = 5,122.33 : x
  2. Step 2: Convert to fraction form
    20,917.23/31,375.63 = 5,122.33/x
  3. Step 3: Cross multiply
    20,917.23x = 31,375.63 × 5,122.33
  4. Step 4: Simplify right side
    20,917.23x = 160,716,330.82
  5. Step 5: Solve for x
    x = 160,716,330.82/20,917.23
  6. Step 6: Final answer
    x = 7,683.44

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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.