Home / 21,238.25-31,861.22-8,751.33

Finding the Fourth Proportional to 21,238.25, 31,861.22 and 8,751.33

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Solution

The fourth proportional to 21,238.25, 31,861.22 and 8,751.33 is: 13,128.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.25 : 31,861.22 = 8,751.33 : x
  2. Step 2: Convert to fraction form
    21,238.25/31,861.22 = 8,751.33/x
  3. Step 3: Cross multiply
    21,238.25x = 31,861.22 × 8,751.33
  4. Step 4: Simplify right side
    21,238.25x = 278,828,050.42
  5. Step 5: Solve for x
    x = 278,828,050.42/21,238.25
  6. Step 6: Final answer
    x = 13,128.58

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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.