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Finding the Fourth Proportional to 8,657.60, 12,992.80 and 3,467.20

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Solution

The fourth proportional to 8,657.60, 12,992.80 and 3,467.20 is: 5,203.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.60 : 12,992.80 = 3,467.20 : x
  2. Step 2: Convert to fraction form
    8,657.60/12,992.80 = 3,467.20/x
  3. Step 3: Cross multiply
    8,657.60x = 12,992.80 × 3,467.20
  4. Step 4: Simplify right side
    8,657.60x = 45,048,636.16
  5. Step 5: Solve for x
    x = 45,048,636.16/8,657.60
  6. Step 6: Final answer
    x = 5,203.36

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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.