Home / 20,888.82-31,335.66-8,413.20

Finding the Fourth Proportional to 20,888.82, 31,335.66 and 8,413.20

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Solution

The fourth proportional to 20,888.82, 31,335.66 and 8,413.20 is: 12,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.82 : 31,335.66 = 8,413.20 : x
  2. Step 2: Convert to fraction form
    20,888.82/31,335.66 = 8,413.20/x
  3. Step 3: Cross multiply
    20,888.82x = 31,335.66 × 8,413.20
  4. Step 4: Simplify right side
    20,888.82x = 263,633,174.71
  5. Step 5: Solve for x
    x = 263,633,174.71/20,888.82
  6. Step 6: Final answer
    x = 12,620.78

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1.5x scale

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.