Home / 18,731.97-28,078.50-8,863.74

Finding the Fourth Proportional to 18,731.97, 28,078.50 and 8,863.74

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Solution

The fourth proportional to 18,731.97, 28,078.50 and 8,863.74 is: 13,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.97 : 28,078.50 = 8,863.74 : x
  2. Step 2: Convert to fraction form
    18,731.97/28,078.50 = 8,863.74/x
  3. Step 3: Cross multiply
    18,731.97x = 28,078.50 × 8,863.74
  4. Step 4: Simplify right side
    18,731.97x = 248,880,523.59
  5. Step 5: Solve for x
    x = 248,880,523.59/18,731.97
  6. Step 6: Final answer
    x = 13,286.40

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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.