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Finding the Fourth Proportional to 18,609, 27,912.54 and 5,459.88

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Solution

The fourth proportional to 18,609, 27,912.54 and 5,459.88 is: 8,189.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609 : 27,912.54 = 5,459.88 : x
  2. Step 2: Convert to fraction form
    18,609/27,912.54 = 5,459.88/x
  3. Step 3: Cross multiply
    18,609x = 27,912.54 × 5,459.88
  4. Step 4: Simplify right side
    18,609x = 152,399,118.90
  5. Step 5: Solve for x
    x = 152,399,118.90/18,609
  6. Step 6: Final answer
    x = 8,189.54

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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.