Home / 15,413.47-21,270.60-8,339.90

Finding the Fourth Proportional to 15,413.47, 21,270.60 and 8,339.90

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Solution

The fourth proportional to 15,413.47, 21,270.60 and 8,339.90 is: 11,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.47 : 21,270.60 = 8,339.90 : x
  2. Step 2: Convert to fraction form
    15,413.47/21,270.60 = 8,339.90/x
  3. Step 3: Cross multiply
    15,413.47x = 21,270.60 × 8,339.90
  4. Step 4: Simplify right side
    15,413.47x = 177,394,676.94
  5. Step 5: Solve for x
    x = 177,394,676.94/15,413.47
  6. Step 6: Final answer
    x = 11,509.07

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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.