Home / 11,811.28-17,694.08-6,620.80

Finding the Fourth Proportional to 11,811.28, 17,694.08 and 6,620.80

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Solution

The fourth proportional to 11,811.28, 17,694.08 and 6,620.80 is: 9,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.28 : 17,694.08 = 6,620.80 : x
  2. Step 2: Convert to fraction form
    11,811.28/17,694.08 = 6,620.80/x
  3. Step 3: Cross multiply
    11,811.28x = 17,694.08 × 6,620.80
  4. Step 4: Simplify right side
    11,811.28x = 117,148,964.86
  5. Step 5: Solve for x
    x = 117,148,964.86/11,811.28
  6. Step 6: Final answer
    x = 9,918.40

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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.