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Finding the Fourth Proportional to 18,965.60, 28,383.60 and 16,632.80

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Solution

The fourth proportional to 18,965.60, 28,383.60 and 16,632.80 is: 24,892.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.60 : 28,383.60 = 16,632.80 : x
  2. Step 2: Convert to fraction form
    18,965.60/28,383.60 = 16,632.80/x
  3. Step 3: Cross multiply
    18,965.60x = 28,383.60 × 16,632.80
  4. Step 4: Simplify right side
    18,965.60x = 472,098,742.08
  5. Step 5: Solve for x
    x = 472,098,742.08/18,965.60
  6. Step 6: Final answer
    x = 24,892.37

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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.