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Finding the Fourth Proportional to 14,660.80, 21,991.20 and 7,662.40

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Solution

The fourth proportional to 14,660.80, 21,991.20 and 7,662.40 is: 11,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,660.80 : 21,991.20 = 7,662.40 : x
  2. Step 2: Convert to fraction form
    14,660.80/21,991.20 = 7,662.40/x
  3. Step 3: Cross multiply
    14,660.80x = 21,991.20 × 7,662.40
  4. Step 4: Simplify right side
    14,660.80x = 168,505,370.88
  5. Step 5: Solve for x
    x = 168,505,370.88/14,660.80
  6. Step 6: Final answer
    x = 11,493.60

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Similar ratio
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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.