Home / 20,873.72-31,236.67-12,979.95

Finding the Fourth Proportional to 20,873.72, 31,236.67 and 12,979.95

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Solution

The fourth proportional to 20,873.72, 31,236.67 and 12,979.95 is: 19,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.72 : 31,236.67 = 12,979.95 : x
  2. Step 2: Convert to fraction form
    20,873.72/31,236.67 = 12,979.95/x
  3. Step 3: Cross multiply
    20,873.72x = 31,236.67 × 12,979.95
  4. Step 4: Simplify right side
    20,873.72x = 405,450,349.87
  5. Step 5: Solve for x
    x = 405,450,349.87/20,873.72
  6. Step 6: Final answer
    x = 19,423.96

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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.