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Finding the Fourth Proportional to 11,488.14, 17,221.80 and 7,979.80

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Solution

The fourth proportional to 11,488.14, 17,221.80 and 7,979.80 is: 11,962.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,488.14 : 17,221.80 = 7,979.80 : x
  2. Step 2: Convert to fraction form
    11,488.14/17,221.80 = 7,979.80/x
  3. Step 3: Cross multiply
    11,488.14x = 17,221.80 × 7,979.80
  4. Step 4: Simplify right side
    11,488.14x = 137,426,519.64
  5. Step 5: Solve for x
    x = 137,426,519.64/11,488.14
  6. Step 6: Final answer
    x = 11,962.47

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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.