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Finding the Fourth Proportional to 18,816, 28,224.18 and 5,668.08

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Solution

The fourth proportional to 18,816, 28,224.18 and 5,668.08 is: 8,502.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816 : 28,224.18 = 5,668.08 : x
  2. Step 2: Convert to fraction form
    18,816/28,224.18 = 5,668.08/x
  3. Step 3: Cross multiply
    18,816x = 28,224.18 × 5,668.08
  4. Step 4: Simplify right side
    18,816x = 159,976,910.17
  5. Step 5: Solve for x
    x = 159,976,910.17/18,816
  6. Step 6: Final answer
    x = 8,502.17

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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.