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Finding the Fourth Proportional to 18,293.30, 27,418.08 and 8,422.64

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Solution

The fourth proportional to 18,293.30, 27,418.08 and 8,422.64 is: 12,623.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,293.30 : 27,418.08 = 8,422.64 : x
  2. Step 2: Convert to fraction form
    18,293.30/27,418.08 = 8,422.64/x
  3. Step 3: Cross multiply
    18,293.30x = 27,418.08 × 8,422.64
  4. Step 4: Simplify right side
    18,293.30x = 230,932,617.33
  5. Step 5: Solve for x
    x = 230,932,617.33/18,293.30
  6. Step 6: Final answer
    x = 12,623.89

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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.