Home / 8,719.31-13,078.97-2,145.62

Finding the Fourth Proportional to 8,719.31, 13,078.97 and 2,145.62

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Solution

The fourth proportional to 8,719.31, 13,078.97 and 2,145.62 is: 3,218.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.31 : 13,078.97 = 2,145.62 : x
  2. Step 2: Convert to fraction form
    8,719.31/13,078.97 = 2,145.62/x
  3. Step 3: Cross multiply
    8,719.31x = 13,078.97 × 2,145.62
  4. Step 4: Simplify right side
    8,719.31x = 28,062,499.61
  5. Step 5: Solve for x
    x = 28,062,499.61/8,719.31
  6. Step 6: Final answer
    x = 3,218.43

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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.