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Finding the Fourth Proportional to 45,286.88, 67,908.47 and 18,984.56

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Solution

The fourth proportional to 45,286.88, 67,908.47 and 18,984.56 is: 28,467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,286.88 : 67,908.47 = 18,984.56 : x
  2. Step 2: Convert to fraction form
    45,286.88/67,908.47 = 18,984.56/x
  3. Step 3: Cross multiply
    45,286.88x = 67,908.47 × 18,984.56
  4. Step 4: Simplify right side
    45,286.88x = 1,289,212,423.22
  5. Step 5: Solve for x
    x = 1,289,212,423.22/45,286.88
  6. Step 6: Final answer
    x = 28,467.68

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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.