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Finding the Fourth Proportional to 8,123.48, 12,185.21 and 2,280.54

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Solution

The fourth proportional to 8,123.48, 12,185.21 and 2,280.54 is: 3,420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.48 : 12,185.21 = 2,280.54 : x
  2. Step 2: Convert to fraction form
    8,123.48/12,185.21 = 2,280.54/x
  3. Step 3: Cross multiply
    8,123.48x = 12,185.21 × 2,280.54
  4. Step 4: Simplify right side
    8,123.48x = 27,788,847.41
  5. Step 5: Solve for x
    x = 27,788,847.41/8,123.48
  6. Step 6: Final answer
    x = 3,420.81

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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.