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Finding the Fourth Proportional to 13,999.44, 20,999.16 and 13,144.08

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Solution

The fourth proportional to 13,999.44, 20,999.16 and 13,144.08 is: 19,716.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.44 : 20,999.16 = 13,144.08 : x
  2. Step 2: Convert to fraction form
    13,999.44/20,999.16 = 13,144.08/x
  3. Step 3: Cross multiply
    13,999.44x = 20,999.16 × 13,144.08
  4. Step 4: Simplify right side
    13,999.44x = 276,014,638.97
  5. Step 5: Solve for x
    x = 276,014,638.97/13,999.44
  6. Step 6: Final answer
    x = 19,716.12

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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.