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Finding the Fourth Proportional to 12,079.50, 18,129.06 and 6,237.78

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Solution

The fourth proportional to 12,079.50, 18,129.06 and 6,237.78 is: 9,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.50 : 18,129.06 = 6,237.78 : x
  2. Step 2: Convert to fraction form
    12,079.50/18,129.06 = 6,237.78/x
  3. Step 3: Cross multiply
    12,079.50x = 18,129.06 × 6,237.78
  4. Step 4: Simplify right side
    12,079.50x = 113,085,087.89
  5. Step 5: Solve for x
    x = 113,085,087.89/12,079.50
  6. Step 6: Final answer
    x = 9,361.74

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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.