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Finding the Fourth Proportional to 14,379.80, 21,575.03 and 6,479.91

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Solution

The fourth proportional to 14,379.80, 21,575.03 and 6,479.91 is: 9,722.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,379.80 : 21,575.03 = 6,479.91 : x
  2. Step 2: Convert to fraction form
    14,379.80/21,575.03 = 6,479.91/x
  3. Step 3: Cross multiply
    14,379.80x = 21,575.03 × 6,479.91
  4. Step 4: Simplify right side
    14,379.80x = 139,804,220.25
  5. Step 5: Solve for x
    x = 139,804,220.25/14,379.80
  6. Step 6: Final answer
    x = 9,722.27

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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.