Home / 20,837.90-31,255.76-5,255.66

Finding the Fourth Proportional to 20,837.90, 31,255.76 and 5,255.66

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Solution

The fourth proportional to 20,837.90, 31,255.76 and 5,255.66 is: 7,883.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.90 : 31,255.76 = 5,255.66 : x
  2. Step 2: Convert to fraction form
    20,837.90/31,255.76 = 5,255.66/x
  3. Step 3: Cross multiply
    20,837.90x = 31,255.76 × 5,255.66
  4. Step 4: Simplify right side
    20,837.90x = 164,269,647.60
  5. Step 5: Solve for x
    x = 164,269,647.60/20,837.90
  6. Step 6: Final answer
    x = 7,883.22

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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.