Home / 20,872.35-31,313.61-6,081.39

Finding the Fourth Proportional to 20,872.35, 31,313.61 and 6,081.39

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Solution

The fourth proportional to 20,872.35, 31,313.61 and 6,081.39 is: 9,123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.35 : 31,313.61 = 6,081.39 : x
  2. Step 2: Convert to fraction form
    20,872.35/31,313.61 = 6,081.39/x
  3. Step 3: Cross multiply
    20,872.35x = 31,313.61 × 6,081.39
  4. Step 4: Simplify right side
    20,872.35x = 190,430,274.72
  5. Step 5: Solve for x
    x = 190,430,274.72/20,872.35
  6. Step 6: Final answer
    x = 9,123.57

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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.