Home / 8,385.83-12,578.73-2,145.85

Finding the Fourth Proportional to 8,385.83, 12,578.73 and 2,145.85

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Solution

The fourth proportional to 8,385.83, 12,578.73 and 2,145.85 is: 3,218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.83 : 12,578.73 = 2,145.85 : x
  2. Step 2: Convert to fraction form
    8,385.83/12,578.73 = 2,145.85/x
  3. Step 3: Cross multiply
    8,385.83x = 12,578.73 × 2,145.85
  4. Step 4: Simplify right side
    8,385.83x = 26,992,067.77
  5. Step 5: Solve for x
    x = 26,992,067.77/8,385.83
  6. Step 6: Final answer
    x = 3,218.77

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Double scale
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Similar ratio
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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.