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Finding the Fourth Proportional to 18,809.99, 25,958.07 and 10,312.92

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Solution

The fourth proportional to 18,809.99, 25,958.07 and 10,312.92 is: 14,231.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.99 : 25,958.07 = 10,312.92 : x
  2. Step 2: Convert to fraction form
    18,809.99/25,958.07 = 10,312.92/x
  3. Step 3: Cross multiply
    18,809.99x = 25,958.07 × 10,312.92
  4. Step 4: Simplify right side
    18,809.99x = 267,703,499.26
  5. Step 5: Solve for x
    x = 267,703,499.26/18,809.99
  6. Step 6: Final answer
    x = 14,231.99

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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.