Home / 13,108.05-18,078.68-9,272.85

Finding the Fourth Proportional to 13,108.05, 18,078.68 and 9,272.85

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Solution

The fourth proportional to 13,108.05, 18,078.68 and 9,272.85 is: 12,789.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.05 : 18,078.68 = 9,272.85 : x
  2. Step 2: Convert to fraction form
    13,108.05/18,078.68 = 9,272.85/x
  3. Step 3: Cross multiply
    13,108.05x = 18,078.68 × 9,272.85
  4. Step 4: Simplify right side
    13,108.05x = 167,640,841.47
  5. Step 5: Solve for x
    x = 167,640,841.47/13,108.05
  6. Step 6: Final answer
    x = 12,789.15

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1.5x scale

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.