Home / 20,921.23-31,385.72-6,881.83

Finding the Fourth Proportional to 20,921.23, 31,385.72 and 6,881.83

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Solution

The fourth proportional to 20,921.23, 31,385.72 and 6,881.83 is: 10,324.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.23 : 31,385.72 = 6,881.83 : x
  2. Step 2: Convert to fraction form
    20,921.23/31,385.72 = 6,881.83/x
  3. Step 3: Cross multiply
    20,921.23x = 31,385.72 × 6,881.83
  4. Step 4: Simplify right side
    20,921.23x = 215,991,076.59
  5. Step 5: Solve for x
    x = 215,991,076.59/20,921.23
  6. Step 6: Final answer
    x = 10,324.02

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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.