Home / 20,727.32-31,098.60-12,942.68

Finding the Fourth Proportional to 20,727.32, 31,098.60 and 12,942.68

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Solution

The fourth proportional to 20,727.32, 31,098.60 and 12,942.68 is: 19,418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.32 : 31,098.60 = 12,942.68 : x
  2. Step 2: Convert to fraction form
    20,727.32/31,098.60 = 12,942.68/x
  3. Step 3: Cross multiply
    20,727.32x = 31,098.60 × 12,942.68
  4. Step 4: Simplify right side
    20,727.32x = 402,499,228.25
  5. Step 5: Solve for x
    x = 402,499,228.25/20,727.32
  6. Step 6: Final answer
    x = 19,418.78

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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.