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Finding the Fourth Proportional to 18,706.79, 25,815.75 and 10,323.29

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Solution

The fourth proportional to 18,706.79, 25,815.75 and 10,323.29 is: 14,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.79 : 25,815.75 = 10,323.29 : x
  2. Step 2: Convert to fraction form
    18,706.79/25,815.75 = 10,323.29/x
  3. Step 3: Cross multiply
    18,706.79x = 25,815.75 × 10,323.29
  4. Step 4: Simplify right side
    18,706.79x = 266,503,473.82
  5. Step 5: Solve for x
    x = 266,503,473.82/18,706.79
  6. Step 6: Final answer
    x = 14,246.35

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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.