Home / 6,121.80-8,445.38-3,730.86

Finding the Fourth Proportional to 6,121.80, 8,445.38 and 3,730.86

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Solution

The fourth proportional to 6,121.80, 8,445.38 and 3,730.86 is: 5,146.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.80 : 8,445.38 = 3,730.86 : x
  2. Step 2: Convert to fraction form
    6,121.80/8,445.38 = 3,730.86/x
  3. Step 3: Cross multiply
    6,121.80x = 8,445.38 × 3,730.86
  4. Step 4: Simplify right side
    6,121.80x = 31,508,511.77
  5. Step 5: Solve for x
    x = 31,508,511.77/6,121.80
  6. Step 6: Final answer
    x = 5,146.94

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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.