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Finding the Fourth Proportional to 12,180.40, 18,272.40 and 4,388.48

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Solution

The fourth proportional to 12,180.40, 18,272.40 and 4,388.48 is: 6,583.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.40 : 18,272.40 = 4,388.48 : x
  2. Step 2: Convert to fraction form
    12,180.40/18,272.40 = 4,388.48/x
  3. Step 3: Cross multiply
    12,180.40x = 18,272.40 × 4,388.48
  4. Step 4: Simplify right side
    12,180.40x = 80,188,061.95
  5. Step 5: Solve for x
    x = 80,188,061.95/12,180.40
  6. Step 6: Final answer
    x = 6,583.37

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1.5x scale

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.