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Finding the Fourth Proportional to 13,766.82, 18,998.25 and 7,479.21

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Solution

The fourth proportional to 13,766.82, 18,998.25 and 7,479.21 is: 10,321.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.82 : 18,998.25 = 7,479.21 : x
  2. Step 2: Convert to fraction form
    13,766.82/18,998.25 = 7,479.21/x
  3. Step 3: Cross multiply
    13,766.82x = 18,998.25 × 7,479.21
  4. Step 4: Simplify right side
    13,766.82x = 142,091,901.38
  5. Step 5: Solve for x
    x = 142,091,901.38/13,766.82
  6. Step 6: Final answer
    x = 10,321.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.