Home / 7,120.56-9,826.20-3,976.76

Finding the Fourth Proportional to 7,120.56, 9,826.20 and 3,976.76

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Solution

The fourth proportional to 7,120.56, 9,826.20 and 3,976.76 is: 5,487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.56 : 9,826.20 = 3,976.76 : x
  2. Step 2: Convert to fraction form
    7,120.56/9,826.20 = 3,976.76/x
  3. Step 3: Cross multiply
    7,120.56x = 9,826.20 × 3,976.76
  4. Step 4: Simplify right side
    7,120.56x = 39,076,439.11
  5. Step 5: Solve for x
    x = 39,076,439.11/7,120.56
  6. Step 6: Final answer
    x = 5,487.83

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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.