Home / 20,418.34-30,631.87-7,091.75

Finding the Fourth Proportional to 20,418.34, 30,631.87 and 7,091.75

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Solution

The fourth proportional to 20,418.34, 30,631.87 and 7,091.75 is: 10,639.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.34 : 30,631.87 = 7,091.75 : x
  2. Step 2: Convert to fraction form
    20,418.34/30,631.87 = 7,091.75/x
  3. Step 3: Cross multiply
    20,418.34x = 30,631.87 × 7,091.75
  4. Step 4: Simplify right side
    20,418.34x = 217,233,375.45
  5. Step 5: Solve for x
    x = 217,233,375.45/20,418.34
  6. Step 6: Final answer
    x = 10,639.13

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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.