Home / 21,198.10-29,236.68-18,778.05

Finding the Fourth Proportional to 21,198.10, 29,236.68 and 18,778.05

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Solution

The fourth proportional to 21,198.10, 29,236.68 and 18,778.05 is: 25,898.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.10 : 29,236.68 = 18,778.05 : x
  2. Step 2: Convert to fraction form
    21,198.10/29,236.68 = 18,778.05/x
  3. Step 3: Cross multiply
    21,198.10x = 29,236.68 × 18,778.05
  4. Step 4: Simplify right side
    21,198.10x = 549,007,692.69
  5. Step 5: Solve for x
    x = 549,007,692.69/21,198.10
  6. Step 6: Final answer
    x = 25,898.91

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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.