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Finding the Fourth Proportional to 12,606.83, 18,890.73 and 8,659.98

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Solution

The fourth proportional to 12,606.83, 18,890.73 and 8,659.98 is: 12,976.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,606.83 : 18,890.73 = 8,659.98 : x
  2. Step 2: Convert to fraction form
    12,606.83/18,890.73 = 8,659.98/x
  3. Step 3: Cross multiply
    12,606.83x = 18,890.73 × 8,659.98
  4. Step 4: Simplify right side
    12,606.83x = 163,593,343.99
  5. Step 5: Solve for x
    x = 163,593,343.99/12,606.83
  6. Step 6: Final answer
    x = 12,976.56

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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.