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Finding the Fourth Proportional to 14,936.20, 20,611.86 and 8,221.48

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Solution

The fourth proportional to 14,936.20, 20,611.86 and 8,221.48 is: 11,345.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,936.20 : 20,611.86 = 8,221.48 : x
  2. Step 2: Convert to fraction form
    14,936.20/20,611.86 = 8,221.48/x
  3. Step 3: Cross multiply
    14,936.20x = 20,611.86 × 8,221.48
  4. Step 4: Simplify right side
    14,936.20x = 169,459,994.75
  5. Step 5: Solve for x
    x = 169,459,994.75/14,936.20
  6. Step 6: Final answer
    x = 11,345.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.