Home / 20,906.21-31,356.99-6,115.25

Finding the Fourth Proportional to 20,906.21, 31,356.99 and 6,115.25

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Solution

The fourth proportional to 20,906.21, 31,356.99 and 6,115.25 is: 9,172.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.21 : 31,356.99 = 6,115.25 : x
  2. Step 2: Convert to fraction form
    20,906.21/31,356.99 = 6,115.25/x
  3. Step 3: Cross multiply
    20,906.21x = 31,356.99 × 6,115.25
  4. Step 4: Simplify right side
    20,906.21x = 191,755,676.31
  5. Step 5: Solve for x
    x = 191,755,676.31/20,906.21
  6. Step 6: Final answer
    x = 9,172.19

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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.