Home / 19,721.33-27,220.79-11,763.89

Finding the Fourth Proportional to 19,721.33, 27,220.79 and 11,763.89

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Solution

The fourth proportional to 19,721.33, 27,220.79 and 11,763.89 is: 16,237.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.33 : 27,220.79 = 11,763.89 : x
  2. Step 2: Convert to fraction form
    19,721.33/27,220.79 = 11,763.89/x
  3. Step 3: Cross multiply
    19,721.33x = 27,220.79 × 11,763.89
  4. Step 4: Simplify right side
    19,721.33x = 320,222,379.27
  5. Step 5: Solve for x
    x = 320,222,379.27/19,721.33
  6. Step 6: Final answer
    x = 16,237.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.