Home / 21,442.20-32,163.30-18,979.80

Finding the Fourth Proportional to 21,442.20, 32,163.30 and 18,979.80

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Solution

The fourth proportional to 21,442.20, 32,163.30 and 18,979.80 is: 28,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,442.20 : 32,163.30 = 18,979.80 : x
  2. Step 2: Convert to fraction form
    21,442.20/32,163.30 = 18,979.80/x
  3. Step 3: Cross multiply
    21,442.20x = 32,163.30 × 18,979.80
  4. Step 4: Simplify right side
    21,442.20x = 610,453,001.34
  5. Step 5: Solve for x
    x = 610,453,001.34/21,442.20
  6. Step 6: Final answer
    x = 28,469.70

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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.