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Finding the Fourth Proportional to 18,819.54, 28,222.63 and 13,538.64

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Solution

The fourth proportional to 18,819.54, 28,222.63 and 13,538.64 is: 20,303.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.54 : 28,222.63 = 13,538.64 : x
  2. Step 2: Convert to fraction form
    18,819.54/28,222.63 = 13,538.64/x
  3. Step 3: Cross multiply
    18,819.54x = 28,222.63 × 13,538.64
  4. Step 4: Simplify right side
    18,819.54x = 382,096,099.41
  5. Step 5: Solve for x
    x = 382,096,099.41/18,819.54
  6. Step 6: Final answer
    x = 20,303.16

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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.