Home / 21,231.24-31,851-8,082.60

Finding the Fourth Proportional to 21,231.24, 31,851 and 8,082.60

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Solution

The fourth proportional to 21,231.24, 31,851 and 8,082.60 is: 12,125.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.24 : 31,851 = 8,082.60 : x
  2. Step 2: Convert to fraction form
    21,231.24/31,851 = 8,082.60/x
  3. Step 3: Cross multiply
    21,231.24x = 31,851 × 8,082.60
  4. Step 4: Simplify right side
    21,231.24x = 257,438,892.60
  5. Step 5: Solve for x
    x = 257,438,892.60/21,231.24
  6. Step 6: Final answer
    x = 12,125.48

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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.