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Finding the Fourth Proportional to 18,660.58, 25,740.03 and 11,101.80

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Solution

The fourth proportional to 18,660.58, 25,740.03 and 11,101.80 is: 15,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.58 : 25,740.03 = 11,101.80 : x
  2. Step 2: Convert to fraction form
    18,660.58/25,740.03 = 11,101.80/x
  3. Step 3: Cross multiply
    18,660.58x = 25,740.03 × 11,101.80
  4. Step 4: Simplify right side
    18,660.58x = 285,760,665.05
  5. Step 5: Solve for x
    x = 285,760,665.05/18,660.58
  6. Step 6: Final answer
    x = 15,313.60

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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.