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Finding the Fourth Proportional to 18,364.56, 25,343.26 and 9,981.08

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Solution

The fourth proportional to 18,364.56, 25,343.26 and 9,981.08 is: 13,773.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.56 : 25,343.26 = 9,981.08 : x
  2. Step 2: Convert to fraction form
    18,364.56/25,343.26 = 9,981.08/x
  3. Step 3: Cross multiply
    18,364.56x = 25,343.26 × 9,981.08
  4. Step 4: Simplify right side
    18,364.56x = 252,953,105.52
  5. Step 5: Solve for x
    x = 252,953,105.52/18,364.56
  6. Step 6: Final answer
    x = 13,773.98

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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.