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Finding the Fourth Proportional to 8,118.56, 12,115.02 and 7,243.76

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Solution

The fourth proportional to 8,118.56, 12,115.02 and 7,243.76 is: 10,809.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.56 : 12,115.02 = 7,243.76 : x
  2. Step 2: Convert to fraction form
    8,118.56/12,115.02 = 7,243.76/x
  3. Step 3: Cross multiply
    8,118.56x = 12,115.02 × 7,243.76
  4. Step 4: Simplify right side
    8,118.56x = 87,758,313.98
  5. Step 5: Solve for x
    x = 87,758,313.98/8,118.56
  6. Step 6: Final answer
    x = 10,809.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.