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Finding the Fourth Proportional to 19,658.51, 27,116.51 and 11,998.29

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Solution

The fourth proportional to 19,658.51, 27,116.51 and 11,998.29 is: 16,550.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.51 : 27,116.51 = 11,998.29 : x
  2. Step 2: Convert to fraction form
    19,658.51/27,116.51 = 11,998.29/x
  3. Step 3: Cross multiply
    19,658.51x = 27,116.51 × 11,998.29
  4. Step 4: Simplify right side
    19,658.51x = 325,351,690.78
  5. Step 5: Solve for x
    x = 325,351,690.78/19,658.51
  6. Step 6: Final answer
    x = 16,550.17

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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.