Home / 21,908.10-32,786.55-13,149.30

Finding the Fourth Proportional to 21,908.10, 32,786.55 and 13,149.30

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Solution

The fourth proportional to 21,908.10, 32,786.55 and 13,149.30 is: 19,678.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.10 : 32,786.55 = 13,149.30 : x
  2. Step 2: Convert to fraction form
    21,908.10/32,786.55 = 13,149.30/x
  3. Step 3: Cross multiply
    21,908.10x = 32,786.55 × 13,149.30
  4. Step 4: Simplify right side
    21,908.10x = 431,120,181.92
  5. Step 5: Solve for x
    x = 431,120,181.92/21,908.10
  6. Step 6: Final answer
    x = 19,678.57

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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.