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Finding the Fourth Proportional to 28,163.22, 42,243.98 and 9,187.80

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Solution

The fourth proportional to 28,163.22, 42,243.98 and 9,187.80 is: 13,781.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.22 : 42,243.98 = 9,187.80 : x
  2. Step 2: Convert to fraction form
    28,163.22/42,243.98 = 9,187.80/x
  3. Step 3: Cross multiply
    28,163.22x = 42,243.98 × 9,187.80
  4. Step 4: Simplify right side
    28,163.22x = 388,129,193.51
  5. Step 5: Solve for x
    x = 388,129,193.51/28,163.22
  6. Step 6: Final answer
    x = 13,781.42

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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.