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Finding the Fourth Proportional to 18,657.25, 27,985.30 and 7,560.96

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Solution

The fourth proportional to 18,657.25, 27,985.30 and 7,560.96 is: 11,341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.25 : 27,985.30 = 7,560.96 : x
  2. Step 2: Convert to fraction form
    18,657.25/27,985.30 = 7,560.96/x
  3. Step 3: Cross multiply
    18,657.25x = 27,985.30 × 7,560.96
  4. Step 4: Simplify right side
    18,657.25x = 211,595,733.89
  5. Step 5: Solve for x
    x = 211,595,733.89/18,657.25
  6. Step 6: Final answer
    x = 11,341.21

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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.