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Finding the Fourth Proportional to 19,996.80, 27,712.20 and 19,714.92

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Solution

The fourth proportional to 19,996.80, 27,712.20 and 19,714.92 is: 27,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,996.80 : 27,712.20 = 19,714.92 : x
  2. Step 2: Convert to fraction form
    19,996.80/27,712.20 = 19,714.92/x
  3. Step 3: Cross multiply
    19,996.80x = 27,712.20 × 19,714.92
  4. Step 4: Simplify right side
    19,996.80x = 546,343,806.02
  5. Step 5: Solve for x
    x = 546,343,806.02/19,996.80
  6. Step 6: Final answer
    x = 27,321.56

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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 (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.