Home / 20,371.40-28,112.82-12,413.96

Finding the Fourth Proportional to 20,371.40, 28,112.82 and 12,413.96

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Solution

The fourth proportional to 20,371.40, 28,112.82 and 12,413.96 is: 17,131.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.40 : 28,112.82 = 12,413.96 : x
  2. Step 2: Convert to fraction form
    20,371.40/28,112.82 = 12,413.96/x
  3. Step 3: Cross multiply
    20,371.40x = 28,112.82 × 12,413.96
  4. Step 4: Simplify right side
    20,371.40x = 348,991,422.97
  5. Step 5: Solve for x
    x = 348,991,422.97/20,371.40
  6. Step 6: Final answer
    x = 17,131.44

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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.