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Finding the Fourth Proportional to 7,992.72, 11,989.64 and 2,445.64

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Solution

The fourth proportional to 7,992.72, 11,989.64 and 2,445.64 is: 3,668.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.72 : 11,989.64 = 2,445.64 : x
  2. Step 2: Convert to fraction form
    7,992.72/11,989.64 = 2,445.64/x
  3. Step 3: Cross multiply
    7,992.72x = 11,989.64 × 2,445.64
  4. Step 4: Simplify right side
    7,992.72x = 29,322,319.31
  5. Step 5: Solve for x
    x = 29,322,319.31/7,992.72
  6. Step 6: Final answer
    x = 3,668.63

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Double scale
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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.