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Finding the Fourth Proportional to 22,442.80, 33,664.20 and 18,986.80

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Solution

The fourth proportional to 22,442.80, 33,664.20 and 18,986.80 is: 28,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,442.80 : 33,664.20 = 18,986.80 : x
  2. Step 2: Convert to fraction form
    22,442.80/33,664.20 = 18,986.80/x
  3. Step 3: Cross multiply
    22,442.80x = 33,664.20 × 18,986.80
  4. Step 4: Simplify right side
    22,442.80x = 639,175,432.56
  5. Step 5: Solve for x
    x = 639,175,432.56/22,442.80
  6. Step 6: Final answer
    x = 28,480.20

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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.