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Finding the Fourth Proportional to 18,703.76, 25,922.66 and 18,353.84

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Solution

The fourth proportional to 18,703.76, 25,922.66 and 18,353.84 is: 25,437.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.76 : 25,922.66 = 18,353.84 : x
  2. Step 2: Convert to fraction form
    18,703.76/25,922.66 = 18,353.84/x
  3. Step 3: Cross multiply
    18,703.76x = 25,922.66 × 18,353.84
  4. Step 4: Simplify right side
    18,703.76x = 475,780,354.01
  5. Step 5: Solve for x
    x = 475,780,354.01/18,703.76
  6. Step 6: Final answer
    x = 25,437.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.