Home / 20,816.42-31,224.60-5,234.04

Finding the Fourth Proportional to 20,816.42, 31,224.60 and 5,234.04

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Solution

The fourth proportional to 20,816.42, 31,224.60 and 5,234.04 is: 7,851.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.42 : 31,224.60 = 5,234.04 : x
  2. Step 2: Convert to fraction form
    20,816.42/31,224.60 = 5,234.04/x
  3. Step 3: Cross multiply
    20,816.42x = 31,224.60 × 5,234.04
  4. Step 4: Simplify right side
    20,816.42x = 163,430,805.38
  5. Step 5: Solve for x
    x = 163,430,805.38/20,816.42
  6. Step 6: Final answer
    x = 7,851.05

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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.