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Finding the Fourth Proportional to 17,161.20, 25,741.80 and 11,912.40

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Solution

The fourth proportional to 17,161.20, 25,741.80 and 11,912.40 is: 17,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,161.20 : 25,741.80 = 11,912.40 : x
  2. Step 2: Convert to fraction form
    17,161.20/25,741.80 = 11,912.40/x
  3. Step 3: Cross multiply
    17,161.20x = 25,741.80 × 11,912.40
  4. Step 4: Simplify right side
    17,161.20x = 306,646,618.32
  5. Step 5: Solve for x
    x = 306,646,618.32/17,161.20
  6. Step 6: Final answer
    x = 17,868.60

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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.