Home / 20,662.56-31,002.48-8,972.64

Finding the Fourth Proportional to 20,662.56, 31,002.48 and 8,972.64

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Solution

The fourth proportional to 20,662.56, 31,002.48 and 8,972.64 is: 13,462.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.56 : 31,002.48 = 8,972.64 : x
  2. Step 2: Convert to fraction form
    20,662.56/31,002.48 = 8,972.64/x
  3. Step 3: Cross multiply
    20,662.56x = 31,002.48 × 8,972.64
  4. Step 4: Simplify right side
    20,662.56x = 278,174,092.15
  5. Step 5: Solve for x
    x = 278,174,092.15/20,662.56
  6. Step 6: Final answer
    x = 13,462.71

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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.