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Finding the Fourth Proportional to 18,808.84, 25,956.12 and 10,425.34

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Solution

The fourth proportional to 18,808.84, 25,956.12 and 10,425.34 is: 14,386.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.84 : 25,956.12 = 10,425.34 : x
  2. Step 2: Convert to fraction form
    18,808.84/25,956.12 = 10,425.34/x
  3. Step 3: Cross multiply
    18,808.84x = 25,956.12 × 10,425.34
  4. Step 4: Simplify right side
    18,808.84x = 270,601,376.08
  5. Step 5: Solve for x
    x = 270,601,376.08/18,808.84
  6. Step 6: Final answer
    x = 14,386.93

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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.