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Finding the Fourth Proportional to 12,074.55, 18,111.83 and 5,513.55

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Solution

The fourth proportional to 12,074.55, 18,111.83 and 5,513.55 is: 8,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,074.55 : 18,111.83 = 5,513.55 : x
  2. Step 2: Convert to fraction form
    12,074.55/18,111.83 = 5,513.55/x
  3. Step 3: Cross multiply
    12,074.55x = 18,111.83 × 5,513.55
  4. Step 4: Simplify right side
    12,074.55x = 99,860,452.73
  5. Step 5: Solve for x
    x = 99,860,452.73/12,074.55
  6. Step 6: Final answer
    x = 8,270.33

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Half scale
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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.