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Finding the Fourth Proportional to 18,261.40, 27,413.70 and 18,131.80

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Solution

The fourth proportional to 18,261.40, 27,413.70 and 18,131.80 is: 27,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,261.40 : 27,413.70 = 18,131.80 : x
  2. Step 2: Convert to fraction form
    18,261.40/27,413.70 = 18,131.80/x
  3. Step 3: Cross multiply
    18,261.40x = 27,413.70 × 18,131.80
  4. Step 4: Simplify right side
    18,261.40x = 497,059,725.66
  5. Step 5: Solve for x
    x = 497,059,725.66/18,261.40
  6. Step 6: Final answer
    x = 27,219.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.