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Finding the Fourth Proportional to 18,800.84, 28,200.72 and 7,704.38

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Solution

The fourth proportional to 18,800.84, 28,200.72 and 7,704.38 is: 11,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.84 : 28,200.72 = 7,704.38 : x
  2. Step 2: Convert to fraction form
    18,800.84/28,200.72 = 7,704.38/x
  3. Step 3: Cross multiply
    18,800.84x = 28,200.72 × 7,704.38
  4. Step 4: Simplify right side
    18,800.84x = 217,269,063.15
  5. Step 5: Solve for x
    x = 217,269,063.15/18,800.84
  6. Step 6: Final answer
    x = 11,556.35

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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.