Home / 21,845.22-30,137.85-13,447.14

Finding the Fourth Proportional to 21,845.22, 30,137.85 and 13,447.14

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Solution

The fourth proportional to 21,845.22, 30,137.85 and 13,447.14 is: 18,551.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.22 : 30,137.85 = 13,447.14 : x
  2. Step 2: Convert to fraction form
    21,845.22/30,137.85 = 13,447.14/x
  3. Step 3: Cross multiply
    21,845.22x = 30,137.85 × 13,447.14
  4. Step 4: Simplify right side
    21,845.22x = 405,267,888.25
  5. Step 5: Solve for x
    x = 405,267,888.25/21,845.22
  6. Step 6: Final answer
    x = 18,551.79

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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.