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Finding the Fourth Proportional to 18,998.44, 28,497.66 and 5,147.44

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Solution

The fourth proportional to 18,998.44, 28,497.66 and 5,147.44 is: 7,721.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.44 : 28,497.66 = 5,147.44 : x
  2. Step 2: Convert to fraction form
    18,998.44/28,497.66 = 5,147.44/x
  3. Step 3: Cross multiply
    18,998.44x = 28,497.66 × 5,147.44
  4. Step 4: Simplify right side
    18,998.44x = 146,689,904.44
  5. Step 5: Solve for x
    x = 146,689,904.44/18,998.44
  6. Step 6: Final answer
    x = 7,721.16

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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.