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Finding the Fourth Proportional to 12,351.76, 18,511.08 and 7,966.96

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Solution

The fourth proportional to 12,351.76, 18,511.08 and 7,966.96 is: 11,939.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,351.76 : 18,511.08 = 7,966.96 : x
  2. Step 2: Convert to fraction form
    12,351.76/18,511.08 = 7,966.96/x
  3. Step 3: Cross multiply
    12,351.76x = 18,511.08 × 7,966.96
  4. Step 4: Simplify right side
    12,351.76x = 147,477,033.92
  5. Step 5: Solve for x
    x = 147,477,033.92/12,351.76
  6. Step 6: Final answer
    x = 11,939.76

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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.