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Finding the Fourth Proportional to 18,630.32, 27,918.31 and 8,638.12

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Solution

The fourth proportional to 18,630.32, 27,918.31 and 8,638.12 is: 12,944.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.32 : 27,918.31 = 8,638.12 : x
  2. Step 2: Convert to fraction form
    18,630.32/27,918.31 = 8,638.12/x
  3. Step 3: Cross multiply
    18,630.32x = 27,918.31 × 8,638.12
  4. Step 4: Simplify right side
    18,630.32x = 241,161,882.14
  5. Step 5: Solve for x
    x = 241,161,882.14/18,630.32
  6. Step 6: Final answer
    x = 12,944.59

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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.