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Finding the Fourth Proportional to 13,994.22, 21,000.42 and 13,072.08

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Solution

The fourth proportional to 13,994.22, 21,000.42 and 13,072.08 is: 19,616.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.22 : 21,000.42 = 13,072.08 : x
  2. Step 2: Convert to fraction form
    13,994.22/21,000.42 = 13,072.08/x
  3. Step 3: Cross multiply
    13,994.22x = 21,000.42 × 13,072.08
  4. Step 4: Simplify right side
    13,994.22x = 274,519,170.27
  5. Step 5: Solve for x
    x = 274,519,170.27/13,994.22
  6. Step 6: Final answer
    x = 19,616.61

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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.