Home / 21,540.76-32,256.06-12,781.96

Finding the Fourth Proportional to 21,540.76, 32,256.06 and 12,781.96

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Solution

The fourth proportional to 21,540.76, 32,256.06 and 12,781.96 is: 19,140.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.76 : 32,256.06 = 12,781.96 : x
  2. Step 2: Convert to fraction form
    21,540.76/32,256.06 = 12,781.96/x
  3. Step 3: Cross multiply
    21,540.76x = 32,256.06 × 12,781.96
  4. Step 4: Simplify right side
    21,540.76x = 412,295,668.68
  5. Step 5: Solve for x
    x = 412,295,668.68/21,540.76
  6. Step 6: Final answer
    x = 19,140.26

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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.