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Finding the Fourth Proportional to 15,211.67, 20,992.16 and 8,496.16

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Solution

The fourth proportional to 15,211.67, 20,992.16 and 8,496.16 is: 11,724.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.67 : 20,992.16 = 8,496.16 : x
  2. Step 2: Convert to fraction form
    15,211.67/20,992.16 = 8,496.16/x
  3. Step 3: Cross multiply
    15,211.67x = 20,992.16 × 8,496.16
  4. Step 4: Simplify right side
    15,211.67x = 178,352,718.87
  5. Step 5: Solve for x
    x = 178,352,718.87/15,211.67
  6. Step 6: Final answer
    x = 11,724.73

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Half scale
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Double scale
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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.