Home / 8,382.04-11,558.86-7,121.72

Finding the Fourth Proportional to 8,382.04, 11,558.86 and 7,121.72

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Solution

The fourth proportional to 8,382.04, 11,558.86 and 7,121.72 is: 9,820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,382.04 : 11,558.86 = 7,121.72 : x
  2. Step 2: Convert to fraction form
    8,382.04/11,558.86 = 7,121.72/x
  3. Step 3: Cross multiply
    8,382.04x = 11,558.86 × 7,121.72
  4. Step 4: Simplify right side
    8,382.04x = 82,318,964.44
  5. Step 5: Solve for x
    x = 82,318,964.44/8,382.04
  6. Step 6: Final answer
    x = 9,820.87

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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.