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Finding the Fourth Proportional to 18,867.44, 28,275.63 and 7,174.28

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Solution

The fourth proportional to 18,867.44, 28,275.63 and 7,174.28 is: 10,751.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.44 : 28,275.63 = 7,174.28 : x
  2. Step 2: Convert to fraction form
    18,867.44/28,275.63 = 7,174.28/x
  3. Step 3: Cross multiply
    18,867.44x = 28,275.63 × 7,174.28
  4. Step 4: Simplify right side
    18,867.44x = 202,857,286.80
  5. Step 5: Solve for x
    x = 202,857,286.80/18,867.44
  6. Step 6: Final answer
    x = 10,751.71

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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.