Home / 20,823.75-31,236.30-5,241.38

Finding the Fourth Proportional to 20,823.75, 31,236.30 and 5,241.38

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Solution

The fourth proportional to 20,823.75, 31,236.30 and 5,241.38 is: 7,862.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.75 : 31,236.30 = 5,241.38 : x
  2. Step 2: Convert to fraction form
    20,823.75/31,236.30 = 5,241.38/x
  3. Step 3: Cross multiply
    20,823.75x = 31,236.30 × 5,241.38
  4. Step 4: Simplify right side
    20,823.75x = 163,721,161.91
  5. Step 5: Solve for x
    x = 163,721,161.91/20,823.75
  6. Step 6: Final answer
    x = 7,862.23

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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.