Home / 13,721.48-18,936-8,413.24

Finding the Fourth Proportional to 13,721.48, 18,936 and 8,413.24

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Solution

The fourth proportional to 13,721.48, 18,936 and 8,413.24 is: 11,610.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.48 : 18,936 = 8,413.24 : x
  2. Step 2: Convert to fraction form
    13,721.48/18,936 = 8,413.24/x
  3. Step 3: Cross multiply
    13,721.48x = 18,936 × 8,413.24
  4. Step 4: Simplify right side
    13,721.48x = 159,313,112.64
  5. Step 5: Solve for x
    x = 159,313,112.64/13,721.48
  6. Step 6: Final answer
    x = 11,610.49

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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.