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Finding the Fourth Proportional to 12,086, 18,129 and 4,295.12

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Solution

The fourth proportional to 12,086, 18,129 and 4,295.12 is: 6,442.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,086 : 18,129 = 4,295.12 : x
  2. Step 2: Convert to fraction form
    12,086/18,129 = 4,295.12/x
  3. Step 3: Cross multiply
    12,086x = 18,129 × 4,295.12
  4. Step 4: Simplify right side
    12,086x = 77,866,230.48
  5. Step 5: Solve for x
    x = 77,866,230.48/12,086
  6. Step 6: Final answer
    x = 6,442.68

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Double scale
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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.