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Finding the Fourth Proportional to 18,668.84, 27,989.32 and 8,802.48

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Solution

The fourth proportional to 18,668.84, 27,989.32 and 8,802.48 is: 13,197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.84 : 27,989.32 = 8,802.48 : x
  2. Step 2: Convert to fraction form
    18,668.84/27,989.32 = 8,802.48/x
  3. Step 3: Cross multiply
    18,668.84x = 27,989.32 × 8,802.48
  4. Step 4: Simplify right side
    18,668.84x = 246,375,429.51
  5. Step 5: Solve for x
    x = 246,375,429.51/18,668.84
  6. Step 6: Final answer
    x = 13,197.15

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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.