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Finding the Fourth Proportional to 18,994.29, 26,209.35 and 11,922.99

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Solution

The fourth proportional to 18,994.29, 26,209.35 and 11,922.99 is: 16,451.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.29 : 26,209.35 = 11,922.99 : x
  2. Step 2: Convert to fraction form
    18,994.29/26,209.35 = 11,922.99/x
  3. Step 3: Cross multiply
    18,994.29x = 26,209.35 × 11,922.99
  4. Step 4: Simplify right side
    18,994.29x = 312,493,817.96
  5. Step 5: Solve for x
    x = 312,493,817.96/18,994.29
  6. Step 6: Final answer
    x = 16,451.99

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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.