Home / 11,078.73-15,280-7,100.21

Finding the Fourth Proportional to 11,078.73, 15,280 and 7,100.21

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Solution

The fourth proportional to 11,078.73, 15,280 and 7,100.21 is: 9,792.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.73 : 15,280 = 7,100.21 : x
  2. Step 2: Convert to fraction form
    11,078.73/15,280 = 7,100.21/x
  3. Step 3: Cross multiply
    11,078.73x = 15,280 × 7,100.21
  4. Step 4: Simplify right side
    11,078.73x = 108,491,208.80
  5. Step 5: Solve for x
    x = 108,491,208.80/11,078.73
  6. Step 6: Final answer
    x = 9,792.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.