Home / 20,832.20-31,242.10-11,343

Finding the Fourth Proportional to 20,832.20, 31,242.10 and 11,343

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Solution

The fourth proportional to 20,832.20, 31,242.10 and 11,343 is: 17,011.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.20 : 31,242.10 = 11,343 : x
  2. Step 2: Convert to fraction form
    20,832.20/31,242.10 = 11,343/x
  3. Step 3: Cross multiply
    20,832.20x = 31,242.10 × 11,343
  4. Step 4: Simplify right side
    20,832.20x = 354,379,140.30
  5. Step 5: Solve for x
    x = 354,379,140.30/20,832.20
  6. Step 6: Final answer
    x = 17,011.12

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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.