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Finding the Fourth Proportional to 12,112.65, 18,168.99 and 3,347.58

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Solution

The fourth proportional to 12,112.65, 18,168.99 and 3,347.58 is: 5,021.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.65 : 18,168.99 = 3,347.58 : x
  2. Step 2: Convert to fraction form
    12,112.65/18,168.99 = 3,347.58/x
  3. Step 3: Cross multiply
    12,112.65x = 18,168.99 × 3,347.58
  4. Step 4: Simplify right side
    12,112.65x = 60,822,147.54
  5. Step 5: Solve for x
    x = 60,822,147.54/12,112.65
  6. Step 6: Final answer
    x = 5,021.37

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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.