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Finding the Fourth Proportional to 18,903.88, 28,355.82 and 9,037.78

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Solution

The fourth proportional to 18,903.88, 28,355.82 and 9,037.78 is: 13,556.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.88 : 28,355.82 = 9,037.78 : x
  2. Step 2: Convert to fraction form
    18,903.88/28,355.82 = 9,037.78/x
  3. Step 3: Cross multiply
    18,903.88x = 28,355.82 × 9,037.78
  4. Step 4: Simplify right side
    18,903.88x = 256,273,608.94
  5. Step 5: Solve for x
    x = 256,273,608.94/18,903.88
  6. Step 6: Final answer
    x = 13,556.67

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Similar ratio
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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.