Home / 21,236.79-31,855.14-5,654.43

Finding the Fourth Proportional to 21,236.79, 31,855.14 and 5,654.43

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Solution

The fourth proportional to 21,236.79, 31,855.14 and 5,654.43 is: 8,481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.79 : 31,855.14 = 5,654.43 : x
  2. Step 2: Convert to fraction form
    21,236.79/31,855.14 = 5,654.43/x
  3. Step 3: Cross multiply
    21,236.79x = 31,855.14 × 5,654.43
  4. Step 4: Simplify right side
    21,236.79x = 180,122,659.27
  5. Step 5: Solve for x
    x = 180,122,659.27/21,236.79
  6. Step 6: Final answer
    x = 8,481.63

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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.