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Finding the Fourth Proportional to 18,660.68, 25,743.42 and 12,608.99

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Solution

The fourth proportional to 18,660.68, 25,743.42 and 12,608.99 is: 17,394.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.68 : 25,743.42 = 12,608.99 : x
  2. Step 2: Convert to fraction form
    18,660.68/25,743.42 = 12,608.99/x
  3. Step 3: Cross multiply
    18,660.68x = 25,743.42 × 12,608.99
  4. Step 4: Simplify right side
    18,660.68x = 324,598,525.35
  5. Step 5: Solve for x
    x = 324,598,525.35/18,660.68
  6. Step 6: Final answer
    x = 17,394.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.