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Finding the Fourth Proportional to 18,863.66, 28,286.37 and 5,713.12

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Solution

The fourth proportional to 18,863.66, 28,286.37 and 5,713.12 is: 8,566.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.66 : 28,286.37 = 5,713.12 : x
  2. Step 2: Convert to fraction form
    18,863.66/28,286.37 = 5,713.12/x
  3. Step 3: Cross multiply
    18,863.66x = 28,286.37 × 5,713.12
  4. Step 4: Simplify right side
    18,863.66x = 161,603,284.74
  5. Step 5: Solve for x
    x = 161,603,284.74/18,863.66
  6. Step 6: Final answer
    x = 8,566.91

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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.