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Finding the Fourth Proportional to 14,379.43, 19,843.77 and 7,919.80

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Solution

The fourth proportional to 14,379.43, 19,843.77 and 7,919.80 is: 10,929.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,379.43 : 19,843.77 = 7,919.80 : x
  2. Step 2: Convert to fraction form
    14,379.43/19,843.77 = 7,919.80/x
  3. Step 3: Cross multiply
    14,379.43x = 19,843.77 × 7,919.80
  4. Step 4: Simplify right side
    14,379.43x = 157,158,689.65
  5. Step 5: Solve for x
    x = 157,158,689.65/14,379.43
  6. Step 6: Final answer
    x = 10,929.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.