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Finding the Fourth Proportional to 13,994.48, 20,991.68 and 5,110.48

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Solution

The fourth proportional to 13,994.48, 20,991.68 and 5,110.48 is: 7,665.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.48 : 20,991.68 = 5,110.48 : x
  2. Step 2: Convert to fraction form
    13,994.48/20,991.68 = 5,110.48/x
  3. Step 3: Cross multiply
    13,994.48x = 20,991.68 × 5,110.48
  4. Step 4: Simplify right side
    13,994.48x = 107,277,560.81
  5. Step 5: Solve for x
    x = 107,277,560.81/13,994.48
  6. Step 6: Final answer
    x = 7,665.71

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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.