Home / 21,231.67-31,858.55-11,865.91

Finding the Fourth Proportional to 21,231.67, 31,858.55 and 11,865.91

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Solution

The fourth proportional to 21,231.67, 31,858.55 and 11,865.91 is: 17,805.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.67 : 31,858.55 = 11,865.91 : x
  2. Step 2: Convert to fraction form
    21,231.67/31,858.55 = 11,865.91/x
  3. Step 3: Cross multiply
    21,231.67x = 31,858.55 × 11,865.91
  4. Step 4: Simplify right side
    21,231.67x = 378,030,687.03
  5. Step 5: Solve for x
    x = 378,030,687.03/21,231.67
  6. Step 6: Final answer
    x = 17,805.04

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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.