Home / 21,413.20-29,549.96-11,981.84

Finding the Fourth Proportional to 21,413.20, 29,549.96 and 11,981.84

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Solution

The fourth proportional to 21,413.20, 29,549.96 and 11,981.84 is: 16,534.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.20 : 29,549.96 = 11,981.84 : x
  2. Step 2: Convert to fraction form
    21,413.20/29,549.96 = 11,981.84/x
  3. Step 3: Cross multiply
    21,413.20x = 29,549.96 × 11,981.84
  4. Step 4: Simplify right side
    21,413.20x = 354,062,892.73
  5. Step 5: Solve for x
    x = 354,062,892.73/21,413.20
  6. Step 6: Final answer
    x = 16,534.80

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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.