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Finding the Fourth Proportional to 18,993.68, 26,212.94 and 12,608.99

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Solution

The fourth proportional to 18,993.68, 26,212.94 and 12,608.99 is: 17,401.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.68 : 26,212.94 = 12,608.99 : x
  2. Step 2: Convert to fraction form
    18,993.68/26,212.94 = 12,608.99/x
  3. Step 3: Cross multiply
    18,993.68x = 26,212.94 × 12,608.99
  4. Step 4: Simplify right side
    18,993.68x = 330,518,504.22
  5. Step 5: Solve for x
    x = 330,518,504.22/18,993.68
  6. Step 6: Final answer
    x = 17,401.50

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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.