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Finding the Fourth Proportional to 19,998.21, 27,599.19 and 11,503.11

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Solution

The fourth proportional to 19,998.21, 27,599.19 and 11,503.11 is: 15,875.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.21 : 27,599.19 = 11,503.11 : x
  2. Step 2: Convert to fraction form
    19,998.21/27,599.19 = 11,503.11/x
  3. Step 3: Cross multiply
    19,998.21x = 27,599.19 × 11,503.11
  4. Step 4: Simplify right side
    19,998.21x = 317,476,518.48
  5. Step 5: Solve for x
    x = 317,476,518.48/19,998.21
  6. Step 6: Final answer
    x = 15,875.25

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Half scale
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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.