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Finding the Fourth Proportional to 12,479.38, 18,719.06 and 3,245.38

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Solution

The fourth proportional to 12,479.38, 18,719.06 and 3,245.38 is: 4,868.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.38 : 18,719.06 = 3,245.38 : x
  2. Step 2: Convert to fraction form
    12,479.38/18,719.06 = 3,245.38/x
  3. Step 3: Cross multiply
    12,479.38x = 18,719.06 × 3,245.38
  4. Step 4: Simplify right side
    12,479.38x = 60,750,462.94
  5. Step 5: Solve for x
    x = 60,750,462.94/12,479.38
  6. Step 6: Final answer
    x = 4,868.07

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Similar ratio
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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.