Home / 20,982.53-31,475.16-5,400.16

Finding the Fourth Proportional to 20,982.53, 31,475.16 and 5,400.16

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Solution

The fourth proportional to 20,982.53, 31,475.16 and 5,400.16 is: 8,100.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.53 : 31,475.16 = 5,400.16 : x
  2. Step 2: Convert to fraction form
    20,982.53/31,475.16 = 5,400.16/x
  3. Step 3: Cross multiply
    20,982.53x = 31,475.16 × 5,400.16
  4. Step 4: Simplify right side
    20,982.53x = 169,970,900.03
  5. Step 5: Solve for x
    x = 169,970,900.03/20,982.53
  6. Step 6: Final answer
    x = 8,100.59

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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.