Home / 15,413.31-21,270.33-8,339.85

Finding the Fourth Proportional to 15,413.31, 21,270.33 and 8,339.85

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Solution

The fourth proportional to 15,413.31, 21,270.33 and 8,339.85 is: 11,508.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.31 : 21,270.33 = 8,339.85 : x
  2. Step 2: Convert to fraction form
    15,413.31/21,270.33 = 8,339.85/x
  3. Step 3: Cross multiply
    15,413.31x = 21,270.33 × 8,339.85
  4. Step 4: Simplify right side
    15,413.31x = 177,391,361.65
  5. Step 5: Solve for x
    x = 177,391,361.65/15,413.31
  6. Step 6: Final answer
    x = 11,508.97

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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.