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Finding the Fourth Proportional to 16,620, 22,935.60 and 9,168

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Solution

The fourth proportional to 16,620, 22,935.60 and 9,168 is: 12,651.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,620 : 22,935.60 = 9,168 : x
  2. Step 2: Convert to fraction form
    16,620/22,935.60 = 9,168/x
  3. Step 3: Cross multiply
    16,620x = 22,935.60 × 9,168
  4. Step 4: Simplify right side
    16,620x = 210,273,580.80
  5. Step 5: Solve for x
    x = 210,273,580.80/16,620
  6. Step 6: Final answer
    x = 12,651.84

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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.