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Finding the Fourth Proportional to 19,999.28, 29,943.84 and 18,154.10

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Solution

The fourth proportional to 19,999.28, 29,943.84 and 18,154.10 is: 27,181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.28 : 29,943.84 = 18,154.10 : x
  2. Step 2: Convert to fraction form
    19,999.28/29,943.84 = 18,154.10/x
  3. Step 3: Cross multiply
    19,999.28x = 29,943.84 × 18,154.10
  4. Step 4: Simplify right side
    19,999.28x = 543,603,465.74
  5. Step 5: Solve for x
    x = 543,603,465.74/19,999.28
  6. Step 6: Final answer
    x = 27,181.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.