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Finding the Fourth Proportional to 11,992.76, 16,548.07 and 7,211.56

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Solution

The fourth proportional to 11,992.76, 16,548.07 and 7,211.56 is: 9,950.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.76 : 16,548.07 = 7,211.56 : x
  2. Step 2: Convert to fraction form
    11,992.76/16,548.07 = 7,211.56/x
  3. Step 3: Cross multiply
    11,992.76x = 16,548.07 × 7,211.56
  4. Step 4: Simplify right side
    11,992.76x = 119,337,399.69
  5. Step 5: Solve for x
    x = 119,337,399.69/11,992.76
  6. Step 6: Final answer
    x = 9,950.79

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Half scale
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Double scale
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Similar ratio
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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.