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Finding the Fourth Proportional to 27,121.38, 40,682.79 and 8,653.38

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Solution

The fourth proportional to 27,121.38, 40,682.79 and 8,653.38 is: 12,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,121.38 : 40,682.79 = 8,653.38 : x
  2. Step 2: Convert to fraction form
    27,121.38/40,682.79 = 8,653.38/x
  3. Step 3: Cross multiply
    27,121.38x = 40,682.79 × 8,653.38
  4. Step 4: Simplify right side
    27,121.38x = 352,043,641.33
  5. Step 5: Solve for x
    x = 352,043,641.33/27,121.38
  6. Step 6: Final answer
    x = 12,980.30

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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.