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Finding the Fourth Proportional to 18,824.55, 25,978.70 and 11,269.42

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Solution

The fourth proportional to 18,824.55, 25,978.70 and 11,269.42 is: 15,552.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.55 : 25,978.70 = 11,269.42 : x
  2. Step 2: Convert to fraction form
    18,824.55/25,978.70 = 11,269.42/x
  3. Step 3: Cross multiply
    18,824.55x = 25,978.70 × 11,269.42
  4. Step 4: Simplify right side
    18,824.55x = 292,764,881.35
  5. Step 5: Solve for x
    x = 292,764,881.35/18,824.55
  6. Step 6: Final answer
    x = 15,552.29

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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.