Home / 8,121.38-11,212.67-6,632.85

Finding the Fourth Proportional to 8,121.38, 11,212.67 and 6,632.85

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Solution

The fourth proportional to 8,121.38, 11,212.67 and 6,632.85 is: 9,157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.38 : 11,212.67 = 6,632.85 : x
  2. Step 2: Convert to fraction form
    8,121.38/11,212.67 = 6,632.85/x
  3. Step 3: Cross multiply
    8,121.38x = 11,212.67 × 6,632.85
  4. Step 4: Simplify right side
    8,121.38x = 74,371,925.05
  5. Step 5: Solve for x
    x = 74,371,925.05/8,121.38
  6. Step 6: Final answer
    x = 9,157.55

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Half scale
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Double scale
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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.