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Finding the Fourth Proportional to 18,419.65, 27,623.66 and 7,886.89

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Solution

The fourth proportional to 18,419.65, 27,623.66 and 7,886.89 is: 11,827.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.65 : 27,623.66 = 7,886.89 : x
  2. Step 2: Convert to fraction form
    18,419.65/27,623.66 = 7,886.89/x
  3. Step 3: Cross multiply
    18,419.65x = 27,623.66 × 7,886.89
  4. Step 4: Simplify right side
    18,419.65x = 217,864,609.98
  5. Step 5: Solve for x
    x = 217,864,609.98/18,419.65
  6. Step 6: Final answer
    x = 11,827.84

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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.