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Finding the Fourth Proportional to 7,700.89, 11,551.34 and 1,857.51

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Solution

The fourth proportional to 7,700.89, 11,551.34 and 1,857.51 is: 2,786.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,700.89 : 11,551.34 = 1,857.51 : x
  2. Step 2: Convert to fraction form
    7,700.89/11,551.34 = 1,857.51/x
  3. Step 3: Cross multiply
    7,700.89x = 11,551.34 × 1,857.51
  4. Step 4: Simplify right side
    7,700.89x = 21,456,729.56
  5. Step 5: Solve for x
    x = 21,456,729.56/7,700.89
  6. Step 6: Final answer
    x = 2,786.27

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Double scale
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Similar ratio
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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.