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Finding the Fourth Proportional to 12,479.92, 18,719.82 and 5,082.64

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Solution

The fourth proportional to 12,479.92, 18,719.82 and 5,082.64 is: 7,623.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.92 : 18,719.82 = 5,082.64 : x
  2. Step 2: Convert to fraction form
    12,479.92/18,719.82 = 5,082.64/x
  3. Step 3: Cross multiply
    12,479.92x = 18,719.82 × 5,082.64
  4. Step 4: Simplify right side
    12,479.92x = 95,146,105.92
  5. Step 5: Solve for x
    x = 95,146,105.92/12,479.92
  6. Step 6: Final answer
    x = 7,623.94

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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.