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Finding the Fourth Proportional to 18,996.68, 26,217.08 and 12,611.99

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Solution

The fourth proportional to 18,996.68, 26,217.08 and 12,611.99 is: 17,405.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.68 : 26,217.08 = 12,611.99 : x
  2. Step 2: Convert to fraction form
    18,996.68/26,217.08 = 12,611.99/x
  3. Step 3: Cross multiply
    18,996.68x = 26,217.08 × 12,611.99
  4. Step 4: Simplify right side
    18,996.68x = 330,649,550.79
  5. Step 5: Solve for x
    x = 330,649,550.79/18,996.68
  6. Step 6: Final answer
    x = 17,405.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.