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Finding the Fourth Proportional to 18,850.92, 28,265.56 and 7,748.45

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Solution

The fourth proportional to 18,850.92, 28,265.56 and 7,748.45 is: 11,618.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.92 : 28,265.56 = 7,748.45 : x
  2. Step 2: Convert to fraction form
    18,850.92/28,265.56 = 7,748.45/x
  3. Step 3: Cross multiply
    18,850.92x = 28,265.56 × 7,748.45
  4. Step 4: Simplify right side
    18,850.92x = 219,014,137.05
  5. Step 5: Solve for x
    x = 219,014,137.05/18,850.92
  6. Step 6: Final answer
    x = 11,618.22

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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.