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Finding the Fourth Proportional to 7,078.73, 10,618.31 and 1,813.77

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Solution

The fourth proportional to 7,078.73, 10,618.31 and 1,813.77 is: 2,720.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.73 : 10,618.31 = 1,813.77 : x
  2. Step 2: Convert to fraction form
    7,078.73/10,618.31 = 1,813.77/x
  3. Step 3: Cross multiply
    7,078.73x = 10,618.31 × 1,813.77
  4. Step 4: Simplify right side
    7,078.73x = 19,259,176.66
  5. Step 5: Solve for x
    x = 19,259,176.66/7,078.73
  6. Step 6: Final answer
    x = 2,720.71

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1.5x scale

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.