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Finding the Fourth Proportional to 18,858.72, 28,277.24 and 7,773.06

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Solution

The fourth proportional to 18,858.72, 28,277.24 and 7,773.06 is: 11,655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.72 : 28,277.24 = 7,773.06 : x
  2. Step 2: Convert to fraction form
    18,858.72/28,277.24 = 7,773.06/x
  3. Step 3: Cross multiply
    18,858.72x = 28,277.24 × 7,773.06
  4. Step 4: Simplify right side
    18,858.72x = 219,800,683.15
  5. Step 5: Solve for x
    x = 219,800,683.15/18,858.72
  6. Step 6: Final answer
    x = 11,655.12

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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.