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Finding the Fourth Proportional to 18,725.76, 25,830.72 and 12,101.76

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Solution

The fourth proportional to 18,725.76, 25,830.72 and 12,101.76 is: 16,693.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,725.76 : 25,830.72 = 12,101.76 : x
  2. Step 2: Convert to fraction form
    18,725.76/25,830.72 = 12,101.76/x
  3. Step 3: Cross multiply
    18,725.76x = 25,830.72 × 12,101.76
  4. Step 4: Simplify right side
    18,725.76x = 312,597,174.07
  5. Step 5: Solve for x
    x = 312,597,174.07/18,725.76
  6. Step 6: Final answer
    x = 16,693.43

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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.