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Finding the Fourth Proportional to 12,379.44, 18,564.48 and 4,479.88

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Solution

The fourth proportional to 12,379.44, 18,564.48 and 4,479.88 is: 6,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.44 : 18,564.48 = 4,479.88 : x
  2. Step 2: Convert to fraction form
    12,379.44/18,564.48 = 4,479.88/x
  3. Step 3: Cross multiply
    12,379.44x = 18,564.48 × 4,479.88
  4. Step 4: Simplify right side
    12,379.44x = 83,166,642.66
  5. Step 5: Solve for x
    x = 83,166,642.66/12,379.44
  6. Step 6: Final answer
    x = 6,718.13

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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.