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Finding the Fourth Proportional to 8,978.55, 13,467.21 and 3,432.45

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Solution

The fourth proportional to 8,978.55, 13,467.21 and 3,432.45 is: 5,148.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.55 : 13,467.21 = 3,432.45 : x
  2. Step 2: Convert to fraction form
    8,978.55/13,467.21 = 3,432.45/x
  3. Step 3: Cross multiply
    8,978.55x = 13,467.21 × 3,432.45
  4. Step 4: Simplify right side
    8,978.55x = 46,225,544.03
  5. Step 5: Solve for x
    x = 46,225,544.03/8,978.55
  6. Step 6: Final answer
    x = 5,148.44

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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.