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Finding the Fourth Proportional to 18,745.70, 28,086.15 and 8,863.70

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Solution

The fourth proportional to 18,745.70, 28,086.15 and 8,863.70 is: 13,280.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.70 : 28,086.15 = 8,863.70 : x
  2. Step 2: Convert to fraction form
    18,745.70/28,086.15 = 8,863.70/x
  3. Step 3: Cross multiply
    18,745.70x = 28,086.15 × 8,863.70
  4. Step 4: Simplify right side
    18,745.70x = 248,947,207.76
  5. Step 5: Solve for x
    x = 248,947,207.76/18,745.70
  6. Step 6: Final answer
    x = 13,280.23

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1.5x scale

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.