Home / 21,781.38-32,650.56-10,515.96

Finding the Fourth Proportional to 21,781.38, 32,650.56 and 10,515.96

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Solution

The fourth proportional to 21,781.38, 32,650.56 and 10,515.96 is: 15,763.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.38 : 32,650.56 = 10,515.96 : x
  2. Step 2: Convert to fraction form
    21,781.38/32,650.56 = 10,515.96/x
  3. Step 3: Cross multiply
    21,781.38x = 32,650.56 × 10,515.96
  4. Step 4: Simplify right side
    21,781.38x = 343,351,982.94
  5. Step 5: Solve for x
    x = 343,351,982.94/21,781.38
  6. Step 6: Final answer
    x = 15,763.56

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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.