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Finding the Fourth Proportional to 7,543.81, 11,315.72 and 6,921.73

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Solution

The fourth proportional to 7,543.81, 11,315.72 and 6,921.73 is: 10,382.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,543.81 : 11,315.72 = 6,921.73 : x
  2. Step 2: Convert to fraction form
    7,543.81/11,315.72 = 6,921.73/x
  3. Step 3: Cross multiply
    7,543.81x = 11,315.72 × 6,921.73
  4. Step 4: Simplify right side
    7,543.81x = 78,324,358.60
  5. Step 5: Solve for x
    x = 78,324,358.60/7,543.81
  6. Step 6: Final answer
    x = 10,382.60

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Double scale
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Similar ratio
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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.