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Finding the Fourth Proportional to 20,149.68, 30,021.98 and 19,017.88

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Solution

The fourth proportional to 20,149.68, 30,021.98 and 19,017.88 is: 28,335.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,149.68 : 30,021.98 = 19,017.88 : x
  2. Step 2: Convert to fraction form
    20,149.68/30,021.98 = 19,017.88/x
  3. Step 3: Cross multiply
    20,149.68x = 30,021.98 × 19,017.88
  4. Step 4: Simplify right side
    20,149.68x = 570,954,413.00
  5. Step 5: Solve for x
    x = 570,954,413.00/20,149.68
  6. Step 6: Final answer
    x = 28,335.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.