Home / 20,982.16-31,478.64-6,190.48

Finding the Fourth Proportional to 20,982.16, 31,478.64 and 6,190.48

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Solution

The fourth proportional to 20,982.16, 31,478.64 and 6,190.48 is: 9,287.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.16 : 31,478.64 = 6,190.48 : x
  2. Step 2: Convert to fraction form
    20,982.16/31,478.64 = 6,190.48/x
  3. Step 3: Cross multiply
    20,982.16x = 31,478.64 × 6,190.48
  4. Step 4: Simplify right side
    20,982.16x = 194,867,891.35
  5. Step 5: Solve for x
    x = 194,867,891.35/20,982.16
  6. Step 6: Final answer
    x = 9,287.31

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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.