Home / 8,718.85-13,078.17-2,145.09

Finding the Fourth Proportional to 8,718.85, 13,078.17 and 2,145.09

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Solution

The fourth proportional to 8,718.85, 13,078.17 and 2,145.09 is: 3,217.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.85 : 13,078.17 = 2,145.09 : x
  2. Step 2: Convert to fraction form
    8,718.85/13,078.17 = 2,145.09/x
  3. Step 3: Cross multiply
    8,718.85x = 13,078.17 × 2,145.09
  4. Step 4: Simplify right side
    8,718.85x = 28,053,851.69
  5. Step 5: Solve for x
    x = 28,053,851.69/8,718.85
  6. Step 6: Final answer
    x = 3,217.61

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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.