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Finding the Fourth Proportional to 22,158, 30,579 and 12,222

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Solution

The fourth proportional to 22,158, 30,579 and 12,222 is: 16,866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,158 : 30,579 = 12,222 : x
  2. Step 2: Convert to fraction form
    22,158/30,579 = 12,222/x
  3. Step 3: Cross multiply
    22,158x = 30,579 × 12,222
  4. Step 4: Simplify right side
    22,158x = 373,736,538
  5. Step 5: Solve for x
    x = 373,736,538/22,158
  6. Step 6: Final answer
    x = 16,866.89

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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.