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Finding the Fourth Proportional to 8,978.45, 13,467.68 and 2,822.45

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Solution

The fourth proportional to 8,978.45, 13,467.68 and 2,822.45 is: 4,233.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.45 : 13,467.68 = 2,822.45 : x
  2. Step 2: Convert to fraction form
    8,978.45/13,467.68 = 2,822.45/x
  3. Step 3: Cross multiply
    8,978.45x = 13,467.68 × 2,822.45
  4. Step 4: Simplify right side
    8,978.45x = 38,011,771.97
  5. Step 5: Solve for x
    x = 38,011,771.97/8,978.45
  6. Step 6: Final answer
    x = 4,233.67

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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.