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Finding the Fourth Proportional to 18,758.92, 28,096.72 and 13,478.07

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Solution

The fourth proportional to 18,758.92, 28,096.72 and 13,478.07 is: 20,187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.92 : 28,096.72 = 13,478.07 : x
  2. Step 2: Convert to fraction form
    18,758.92/28,096.72 = 13,478.07/x
  3. Step 3: Cross multiply
    18,758.92x = 28,096.72 × 13,478.07
  4. Step 4: Simplify right side
    18,758.92x = 378,689,627.39
  5. Step 5: Solve for x
    x = 378,689,627.39/18,758.92
  6. Step 6: Final answer
    x = 20,187.18

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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.