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Finding the Fourth Proportional to 17,998.65, 26,996.15 and 5,518.78

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Solution

The fourth proportional to 17,998.65, 26,996.15 and 5,518.78 is: 8,277.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,998.65 : 26,996.15 = 5,518.78 : x
  2. Step 2: Convert to fraction form
    17,998.65/26,996.15 = 5,518.78/x
  3. Step 3: Cross multiply
    17,998.65x = 26,996.15 × 5,518.78
  4. Step 4: Simplify right side
    17,998.65x = 148,985,812.70
  5. Step 5: Solve for x
    x = 148,985,812.70/17,998.65
  6. Step 6: Final answer
    x = 8,277.61

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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.