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Finding the Fourth Proportional to 12,778.68, 19,168.92 and 3,418.68

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Solution

The fourth proportional to 12,778.68, 19,168.92 and 3,418.68 is: 5,128.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778.68 : 19,168.92 = 3,418.68 : x
  2. Step 2: Convert to fraction form
    12,778.68/19,168.92 = 3,418.68/x
  3. Step 3: Cross multiply
    12,778.68x = 19,168.92 × 3,418.68
  4. Step 4: Simplify right side
    12,778.68x = 65,532,403.43
  5. Step 5: Solve for x
    x = 65,532,403.43/12,778.68
  6. Step 6: Final answer
    x = 5,128.26

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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.