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Finding the Fourth Proportional to 18,800.60, 28,198.69 and 7,555.48

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Solution

The fourth proportional to 18,800.60, 28,198.69 and 7,555.48 is: 11,332.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.60 : 28,198.69 = 7,555.48 : x
  2. Step 2: Convert to fraction form
    18,800.60/28,198.69 = 7,555.48/x
  3. Step 3: Cross multiply
    18,800.60x = 28,198.69 × 7,555.48
  4. Step 4: Simplify right side
    18,800.60x = 213,054,548.94
  5. Step 5: Solve for x
    x = 213,054,548.94/18,800.60
  6. Step 6: Final answer
    x = 11,332.33

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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.