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Finding the Fourth Proportional to 18,842.99, 25,997.99 and 12,132.50

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Solution

The fourth proportional to 18,842.99, 25,997.99 and 12,132.50 is: 16,739.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.99 : 25,997.99 = 12,132.50 : x
  2. Step 2: Convert to fraction form
    18,842.99/25,997.99 = 12,132.50/x
  3. Step 3: Cross multiply
    18,842.99x = 25,997.99 × 12,132.50
  4. Step 4: Simplify right side
    18,842.99x = 315,420,423.02
  5. Step 5: Solve for x
    x = 315,420,423.02/18,842.99
  6. Step 6: Final answer
    x = 16,739.41

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Double scale
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Similar ratio
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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.