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Finding the Fourth Proportional to 12,480.24, 18,719.99 and 3,246.24

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Solution

The fourth proportional to 12,480.24, 18,719.99 and 3,246.24 is: 4,869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.24 : 18,719.99 = 3,246.24 : x
  2. Step 2: Convert to fraction form
    12,480.24/18,719.99 = 3,246.24/x
  3. Step 3: Cross multiply
    12,480.24x = 18,719.99 × 3,246.24
  4. Step 4: Simplify right side
    12,480.24x = 60,769,494.85
  5. Step 5: Solve for x
    x = 60,769,494.85/12,480.24
  6. Step 6: Final answer
    x = 4,869.26

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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.