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Finding the Fourth Proportional to 19,367.84, 28,978.45 and 11,474.60

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Solution

The fourth proportional to 19,367.84, 28,978.45 and 11,474.60 is: 17,168.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,367.84 : 28,978.45 = 11,474.60 : x
  2. Step 2: Convert to fraction form
    19,367.84/28,978.45 = 11,474.60/x
  3. Step 3: Cross multiply
    19,367.84x = 28,978.45 × 11,474.60
  4. Step 4: Simplify right side
    19,367.84x = 332,515,948.79
  5. Step 5: Solve for x
    x = 332,515,948.79/19,367.84
  6. Step 6: Final answer
    x = 17,168.46

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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.