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Finding the Fourth Proportional to 18,866.37, 28,286.01 and 8,865.48

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Solution

The fourth proportional to 18,866.37, 28,286.01 and 8,865.48 is: 13,291.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.37 : 28,286.01 = 8,865.48 : x
  2. Step 2: Convert to fraction form
    18,866.37/28,286.01 = 8,865.48/x
  3. Step 3: Cross multiply
    18,866.37x = 28,286.01 × 8,865.48
  4. Step 4: Simplify right side
    18,866.37x = 250,769,055.93
  5. Step 5: Solve for x
    x = 250,769,055.93/18,866.37
  6. Step 6: Final answer
    x = 13,291.86

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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.