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Finding the Fourth Proportional to 18,878.72, 28,274.56 and 14,684.80

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Solution

The fourth proportional to 18,878.72, 28,274.56 and 14,684.80 is: 21,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.72 : 28,274.56 = 14,684.80 : x
  2. Step 2: Convert to fraction form
    18,878.72/28,274.56 = 14,684.80/x
  3. Step 3: Cross multiply
    18,878.72x = 28,274.56 × 14,684.80
  4. Step 4: Simplify right side
    18,878.72x = 415,206,258.69
  5. Step 5: Solve for x
    x = 415,206,258.69/18,878.72
  6. Step 6: Final answer
    x = 21,993.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.