Home / 11,921.28-16,450.20-6,614.88

Finding the Fourth Proportional to 11,921.28, 16,450.20 and 6,614.88

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Solution

The fourth proportional to 11,921.28, 16,450.20 and 6,614.88 is: 9,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.28 : 16,450.20 = 6,614.88 : x
  2. Step 2: Convert to fraction form
    11,921.28/16,450.20 = 6,614.88/x
  3. Step 3: Cross multiply
    11,921.28x = 16,450.20 × 6,614.88
  4. Step 4: Simplify right side
    11,921.28x = 108,816,098.98
  5. Step 5: Solve for x
    x = 108,816,098.98/11,921.28
  6. Step 6: Final answer
    x = 9,127.89

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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.