Home / 20,438.49-30,641.20-6,391.29

Finding the Fourth Proportional to 20,438.49, 30,641.20 and 6,391.29

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Solution

The fourth proportional to 20,438.49, 30,641.20 and 6,391.29 is: 9,581.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.49 : 30,641.20 = 6,391.29 : x
  2. Step 2: Convert to fraction form
    20,438.49/30,641.20 = 6,391.29/x
  3. Step 3: Cross multiply
    20,438.49x = 30,641.20 × 6,391.29
  4. Step 4: Simplify right side
    20,438.49x = 195,836,795.15
  5. Step 5: Solve for x
    x = 195,836,795.15/20,438.49
  6. Step 6: Final answer
    x = 9,581.76

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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.