Home / 20,741.22-31,085.19-12,425.94

Finding the Fourth Proportional to 20,741.22, 31,085.19 and 12,425.94

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Solution

The fourth proportional to 20,741.22, 31,085.19 and 12,425.94 is: 18,622.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.22 : 31,085.19 = 12,425.94 : x
  2. Step 2: Convert to fraction form
    20,741.22/31,085.19 = 12,425.94/x
  3. Step 3: Cross multiply
    20,741.22x = 31,085.19 × 12,425.94
  4. Step 4: Simplify right side
    20,741.22x = 386,262,705.83
  5. Step 5: Solve for x
    x = 386,262,705.83/20,741.22
  6. Step 6: Final answer
    x = 18,622.95

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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.