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Finding the Fourth Proportional to 13,992.67, 20,979.69 and 9,551.71

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Solution

The fourth proportional to 13,992.67, 20,979.69 and 9,551.71 is: 14,321.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.67 : 20,979.69 = 9,551.71 : x
  2. Step 2: Convert to fraction form
    13,992.67/20,979.69 = 9,551.71/x
  3. Step 3: Cross multiply
    13,992.67x = 20,979.69 × 9,551.71
  4. Step 4: Simplify right side
    13,992.67x = 200,391,914.77
  5. Step 5: Solve for x
    x = 200,391,914.77/13,992.67
  6. Step 6: Final answer
    x = 14,321.21

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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.