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Finding the Fourth Proportional to 13,991.26, 20,984.92 and 5,671.26

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Solution

The fourth proportional to 13,991.26, 20,984.92 and 5,671.26 is: 8,506.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.26 : 20,984.92 = 5,671.26 : x
  2. Step 2: Convert to fraction form
    13,991.26/20,984.92 = 5,671.26/x
  3. Step 3: Cross multiply
    13,991.26x = 20,984.92 × 5,671.26
  4. Step 4: Simplify right side
    13,991.26x = 119,010,937.40
  5. Step 5: Solve for x
    x = 119,010,937.40/13,991.26
  6. Step 6: Final answer
    x = 8,506.09

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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.