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Finding the Fourth Proportional to 18,649.10, 27,978.28 and 8,786.07

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Solution

The fourth proportional to 18,649.10, 27,978.28 and 8,786.07 is: 13,181.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.10 : 27,978.28 = 8,786.07 : x
  2. Step 2: Convert to fraction form
    18,649.10/27,978.28 = 8,786.07/x
  3. Step 3: Cross multiply
    18,649.10x = 27,978.28 × 8,786.07
  4. Step 4: Simplify right side
    18,649.10x = 245,819,104.59
  5. Step 5: Solve for x
    x = 245,819,104.59/18,649.10
  6. Step 6: Final answer
    x = 13,181.28

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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.