Home / 21,152.22-31,739.85-11,918.94

Finding the Fourth Proportional to 21,152.22, 31,739.85 and 11,918.94

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Solution

The fourth proportional to 21,152.22, 31,739.85 and 11,918.94 is: 17,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.22 : 31,739.85 = 11,918.94 : x
  2. Step 2: Convert to fraction form
    21,152.22/31,739.85 = 11,918.94/x
  3. Step 3: Cross multiply
    21,152.22x = 31,739.85 × 11,918.94
  4. Step 4: Simplify right side
    21,152.22x = 378,305,367.76
  5. Step 5: Solve for x
    x = 378,305,367.76/21,152.22
  6. Step 6: Final answer
    x = 17,884.90

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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.