Home / 21,413.25-29,550.33-11,981.79

Finding the Fourth Proportional to 21,413.25, 29,550.33 and 11,981.79

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Solution

The fourth proportional to 21,413.25, 29,550.33 and 11,981.79 is: 16,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.25 : 29,550.33 = 11,981.79 : x
  2. Step 2: Convert to fraction form
    21,413.25/29,550.33 = 11,981.79/x
  3. Step 3: Cross multiply
    21,413.25x = 29,550.33 × 11,981.79
  4. Step 4: Simplify right side
    21,413.25x = 354,065,848.49
  5. Step 5: Solve for x
    x = 354,065,848.49/21,413.25
  6. Step 6: Final answer
    x = 16,534.90

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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.