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Finding the Fourth Proportional to 18,808.56, 25,956.64 and 10,424.48

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Solution

The fourth proportional to 18,808.56, 25,956.64 and 10,424.48 is: 14,386.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.56 : 25,956.64 = 10,424.48 : x
  2. Step 2: Convert to fraction form
    18,808.56/25,956.64 = 10,424.48/x
  3. Step 3: Cross multiply
    18,808.56x = 25,956.64 × 10,424.48
  4. Step 4: Simplify right side
    18,808.56x = 270,584,474.55
  5. Step 5: Solve for x
    x = 270,584,474.55/18,808.56
  6. Step 6: Final answer
    x = 14,386.24

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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.