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Finding the Fourth Proportional to 12,168.78, 18,253.17 and 3,404.39

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Solution

The fourth proportional to 12,168.78, 18,253.17 and 3,404.39 is: 5,106.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,168.78 : 18,253.17 = 3,404.39 : x
  2. Step 2: Convert to fraction form
    12,168.78/18,253.17 = 3,404.39/x
  3. Step 3: Cross multiply
    12,168.78x = 18,253.17 × 3,404.39
  4. Step 4: Simplify right side
    12,168.78x = 62,140,818.15
  5. Step 5: Solve for x
    x = 62,140,818.15/12,168.78
  6. Step 6: Final answer
    x = 5,106.58

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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.