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Finding the Fourth Proportional to 20,611.61, 28,413.02 and 16,127.58

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Solution

The fourth proportional to 20,611.61, 28,413.02 and 16,127.58 is: 22,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.61 : 28,413.02 = 16,127.58 : x
  2. Step 2: Convert to fraction form
    20,611.61/28,413.02 = 16,127.58/x
  3. Step 3: Cross multiply
    20,611.61x = 28,413.02 × 16,127.58
  4. Step 4: Simplify right side
    20,611.61x = 458,233,253.09
  5. Step 5: Solve for x
    x = 458,233,253.09/20,611.61
  6. Step 6: Final answer
    x = 22,231.80

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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.