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Finding the Fourth Proportional to 12,375.40, 18,561.30 and 3,609.40

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Solution

The fourth proportional to 12,375.40, 18,561.30 and 3,609.40 is: 5,413.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.40 : 18,561.30 = 3,609.40 : x
  2. Step 2: Convert to fraction form
    12,375.40/18,561.30 = 3,609.40/x
  3. Step 3: Cross multiply
    12,375.40x = 18,561.30 × 3,609.40
  4. Step 4: Simplify right side
    12,375.40x = 66,995,156.22
  5. Step 5: Solve for x
    x = 66,995,156.22/12,375.40
  6. Step 6: Final answer
    x = 5,413.58

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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.