Home / 21,269.31-31,904.26-8,122.40

Finding the Fourth Proportional to 21,269.31, 31,904.26 and 8,122.40

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Solution

The fourth proportional to 21,269.31, 31,904.26 and 8,122.40 is: 12,183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.31 : 31,904.26 = 8,122.40 : x
  2. Step 2: Convert to fraction form
    21,269.31/31,904.26 = 8,122.40/x
  3. Step 3: Cross multiply
    21,269.31x = 31,904.26 × 8,122.40
  4. Step 4: Simplify right side
    21,269.31x = 259,139,161.42
  5. Step 5: Solve for x
    x = 259,139,161.42/21,269.31
  6. Step 6: Final answer
    x = 12,183.71

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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.