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Finding the Fourth Proportional to 18,998.84, 28,498.26 and 12,052.28

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Solution

The fourth proportional to 18,998.84, 28,498.26 and 12,052.28 is: 18,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.84 : 28,498.26 = 12,052.28 : x
  2. Step 2: Convert to fraction form
    18,998.84/28,498.26 = 12,052.28/x
  3. Step 3: Cross multiply
    18,998.84x = 28,498.26 × 12,052.28
  4. Step 4: Simplify right side
    18,998.84x = 343,469,009.03
  5. Step 5: Solve for x
    x = 343,469,009.03/18,998.84
  6. Step 6: Final answer
    x = 18,078.42

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