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Finding the Fourth Proportional to 12,082.60, 18,129.08 and 6,243.32

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Solution

The fourth proportional to 12,082.60, 18,129.08 and 6,243.32 is: 9,367.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,082.60 : 18,129.08 = 6,243.32 : x
  2. Step 2: Convert to fraction form
    12,082.60/18,129.08 = 6,243.32/x
  3. Step 3: Cross multiply
    12,082.60x = 18,129.08 × 6,243.32
  4. Step 4: Simplify right side
    12,082.60x = 113,185,647.75
  5. Step 5: Solve for x
    x = 113,185,647.75/12,082.60
  6. Step 6: Final answer
    x = 9,367.66

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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.