Home / 19,212.12-28,821.17-8,118.87

Finding the Fourth Proportional to 19,212.12, 28,821.17 and 8,118.87

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Solution

The fourth proportional to 19,212.12, 28,821.17 and 8,118.87 is: 12,179.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,212.12 : 28,821.17 = 8,118.87 : x
  2. Step 2: Convert to fraction form
    19,212.12/28,821.17 = 8,118.87/x
  3. Step 3: Cross multiply
    19,212.12x = 28,821.17 × 8,118.87
  4. Step 4: Simplify right side
    19,212.12x = 233,995,291.88
  5. Step 5: Solve for x
    x = 233,995,291.88/19,212.12
  6. Step 6: Final answer
    x = 12,179.57

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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.