Home / 28,214.83-38,987.22-20,243.08

Finding the Fourth Proportional to 28,214.83, 38,987.22 and 20,243.08

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Solution

The fourth proportional to 28,214.83, 38,987.22 and 20,243.08 is: 27,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,214.83 : 38,987.22 = 20,243.08 : x
  2. Step 2: Convert to fraction form
    28,214.83/38,987.22 = 20,243.08/x
  3. Step 3: Cross multiply
    28,214.83x = 38,987.22 × 20,243.08
  4. Step 4: Simplify right side
    28,214.83x = 789,221,413.44
  5. Step 5: Solve for x
    x = 789,221,413.44/28,214.83
  6. Step 6: Final answer
    x = 27,971.86

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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.