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Finding the Fourth Proportional to 18,998.33, 28,497.49 and 5,147.33

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Solution

The fourth proportional to 18,998.33, 28,497.49 and 5,147.33 is: 7,720.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.33 : 28,497.49 = 5,147.33 : x
  2. Step 2: Convert to fraction form
    18,998.33/28,497.49 = 5,147.33/x
  3. Step 3: Cross multiply
    18,998.33x = 28,497.49 × 5,147.33
  4. Step 4: Simplify right side
    18,998.33x = 146,685,985.20
  5. Step 5: Solve for x
    x = 146,685,985.20/18,998.33
  6. Step 6: Final answer
    x = 7,720.99

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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.