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Finding the Fourth Proportional to 18,955.69, 28,375.21 and 12,367.69

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Solution

The fourth proportional to 18,955.69, 28,375.21 and 12,367.69 is: 18,513.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.69 : 28,375.21 = 12,367.69 : x
  2. Step 2: Convert to fraction form
    18,955.69/28,375.21 = 12,367.69/x
  3. Step 3: Cross multiply
    18,955.69x = 28,375.21 × 12,367.69
  4. Step 4: Simplify right side
    18,955.69x = 350,935,800.96
  5. Step 5: Solve for x
    x = 350,935,800.96/18,955.69
  6. Step 6: Final answer
    x = 18,513.48

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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.