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Finding the Fourth Proportional to 22,239.84, 30,690.60 and 12,168

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Solution

The fourth proportional to 22,239.84, 30,690.60 and 12,168 is: 16,791.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,239.84 : 30,690.60 = 12,168 : x
  2. Step 2: Convert to fraction form
    22,239.84/30,690.60 = 12,168/x
  3. Step 3: Cross multiply
    22,239.84x = 30,690.60 × 12,168
  4. Step 4: Simplify right side
    22,239.84x = 373,443,220.80
  5. Step 5: Solve for x
    x = 373,443,220.80/22,239.84
  6. Step 6: Final answer
    x = 16,791.63

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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.