Home / 21,918.58-30,239.30-13,413.86

Finding the Fourth Proportional to 21,918.58, 30,239.30 and 13,413.86

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Solution

The fourth proportional to 21,918.58, 30,239.30 and 13,413.86 is: 18,506.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.58 : 30,239.30 = 13,413.86 : x
  2. Step 2: Convert to fraction form
    21,918.58/30,239.30 = 13,413.86/x
  3. Step 3: Cross multiply
    21,918.58x = 30,239.30 × 13,413.86
  4. Step 4: Simplify right side
    21,918.58x = 405,625,736.70
  5. Step 5: Solve for x
    x = 405,625,736.70/21,918.58
  6. Step 6: Final answer
    x = 18,506.02

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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.