Home / 8,458.10-12,678.18-3,190.82

Finding the Fourth Proportional to 8,458.10, 12,678.18 and 3,190.82

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Solution

The fourth proportional to 8,458.10, 12,678.18 and 3,190.82 is: 4,782.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.10 : 12,678.18 = 3,190.82 : x
  2. Step 2: Convert to fraction form
    8,458.10/12,678.18 = 3,190.82/x
  3. Step 3: Cross multiply
    8,458.10x = 12,678.18 × 3,190.82
  4. Step 4: Simplify right side
    8,458.10x = 40,453,790.31
  5. Step 5: Solve for x
    x = 40,453,790.31/8,458.10
  6. Step 6: Final answer
    x = 4,782.85

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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.