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Finding the Fourth Proportional to 18,486.57, 27,729.44 and 12,548.64

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Solution

The fourth proportional to 18,486.57, 27,729.44 and 12,548.64 is: 18,822.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.57 : 27,729.44 = 12,548.64 : x
  2. Step 2: Convert to fraction form
    18,486.57/27,729.44 = 12,548.64/x
  3. Step 3: Cross multiply
    18,486.57x = 27,729.44 × 12,548.64
  4. Step 4: Simplify right side
    18,486.57x = 347,966,697.22
  5. Step 5: Solve for x
    x = 347,966,697.22/18,486.57
  6. Step 6: Final answer
    x = 18,822.67

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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.