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Finding the Fourth Proportional to 13,995.87, 20,999.25 and 5,228.73

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Solution

The fourth proportional to 13,995.87, 20,999.25 and 5,228.73 is: 7,845.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.87 : 20,999.25 = 5,228.73 : x
  2. Step 2: Convert to fraction form
    13,995.87/20,999.25 = 5,228.73/x
  3. Step 3: Cross multiply
    13,995.87x = 20,999.25 × 5,228.73
  4. Step 4: Simplify right side
    13,995.87x = 109,799,408.45
  5. Step 5: Solve for x
    x = 109,799,408.45/13,995.87
  6. Step 6: Final answer
    x = 7,845.13

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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.