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Finding the Fourth Proportional to 18,978.35, 26,175.56 and 14,516.87

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Solution

The fourth proportional to 18,978.35, 26,175.56 and 14,516.87 is: 20,022.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.35 : 26,175.56 = 14,516.87 : x
  2. Step 2: Convert to fraction form
    18,978.35/26,175.56 = 14,516.87/x
  3. Step 3: Cross multiply
    18,978.35x = 26,175.56 × 14,516.87
  4. Step 4: Simplify right side
    18,978.35x = 379,986,998.24
  5. Step 5: Solve for x
    x = 379,986,998.24/18,978.35
  6. Step 6: Final answer
    x = 20,022.14

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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.