Home / 10,511.20-15,766.78-3,940.48

Finding the Fourth Proportional to 10,511.20, 15,766.78 and 3,940.48

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Solution

The fourth proportional to 10,511.20, 15,766.78 and 3,940.48 is: 5,910.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,511.20 : 15,766.78 = 3,940.48 : x
  2. Step 2: Convert to fraction form
    10,511.20/15,766.78 = 3,940.48/x
  3. Step 3: Cross multiply
    10,511.20x = 15,766.78 × 3,940.48
  4. Step 4: Simplify right side
    10,511.20x = 62,128,681.25
  5. Step 5: Solve for x
    x = 62,128,681.25/10,511.20
  6. Step 6: Final answer
    x = 5,910.71

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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.