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Finding the Fourth Proportional to 13,991.62, 20,996.07 and 5,671.71

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Solution

The fourth proportional to 13,991.62, 20,996.07 and 5,671.71 is: 8,511.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.62 : 20,996.07 = 5,671.71 : x
  2. Step 2: Convert to fraction form
    13,991.62/20,996.07 = 5,671.71/x
  3. Step 3: Cross multiply
    13,991.62x = 20,996.07 × 5,671.71
  4. Step 4: Simplify right side
    13,991.62x = 119,083,620.18
  5. Step 5: Solve for x
    x = 119,083,620.18/13,991.62
  6. Step 6: Final answer
    x = 8,511.07

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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.