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Finding the Fourth Proportional to 18,608.09, 27,915.20 and 8,622.81

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Solution

The fourth proportional to 18,608.09, 27,915.20 and 8,622.81 is: 12,935.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.09 : 27,915.20 = 8,622.81 : x
  2. Step 2: Convert to fraction form
    18,608.09/27,915.20 = 8,622.81/x
  3. Step 3: Cross multiply
    18,608.09x = 27,915.20 × 8,622.81
  4. Step 4: Simplify right side
    18,608.09x = 240,707,422.60
  5. Step 5: Solve for x
    x = 240,707,422.60/18,608.09
  6. Step 6: Final answer
    x = 12,935.64

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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.