Home / 20,957.40-31,436.11-5,375.03

Finding the Fourth Proportional to 20,957.40, 31,436.11 and 5,375.03

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Solution

The fourth proportional to 20,957.40, 31,436.11 and 5,375.03 is: 8,062.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.40 : 31,436.11 = 5,375.03 : x
  2. Step 2: Convert to fraction form
    20,957.40/31,436.11 = 5,375.03/x
  3. Step 3: Cross multiply
    20,957.40x = 31,436.11 × 5,375.03
  4. Step 4: Simplify right side
    20,957.40x = 168,970,034.33
  5. Step 5: Solve for x
    x = 168,970,034.33/20,957.40
  6. Step 6: Final answer
    x = 8,062.55

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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.