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Finding the Fourth Proportional to 18,208.76, 25,131.84 and 10,659.05

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Solution

The fourth proportional to 18,208.76, 25,131.84 and 10,659.05 is: 14,711.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,208.76 : 25,131.84 = 10,659.05 : x
  2. Step 2: Convert to fraction form
    18,208.76/25,131.84 = 10,659.05/x
  3. Step 3: Cross multiply
    18,208.76x = 25,131.84 × 10,659.05
  4. Step 4: Simplify right side
    18,208.76x = 267,881,467.77
  5. Step 5: Solve for x
    x = 267,881,467.77/18,208.76
  6. Step 6: Final answer
    x = 14,711.68

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Half scale
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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.