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Finding the Fourth Proportional to 18,597.72, 25,654.14 and 11,141.40

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Solution

The fourth proportional to 18,597.72, 25,654.14 and 11,141.40 is: 15,368.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,597.72 : 25,654.14 = 11,141.40 : x
  2. Step 2: Convert to fraction form
    18,597.72/25,654.14 = 11,141.40/x
  3. Step 3: Cross multiply
    18,597.72x = 25,654.14 × 11,141.40
  4. Step 4: Simplify right side
    18,597.72x = 285,823,035.40
  5. Step 5: Solve for x
    x = 285,823,035.40/18,597.72
  6. Step 6: Final answer
    x = 15,368.71

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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.