Home / 20,505.82-28,297.94-11,431.06

Finding the Fourth Proportional to 20,505.82, 28,297.94 and 11,431.06

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Solution

The fourth proportional to 20,505.82, 28,297.94 and 11,431.06 is: 15,774.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.82 : 28,297.94 = 11,431.06 : x
  2. Step 2: Convert to fraction form
    20,505.82/28,297.94 = 11,431.06/x
  3. Step 3: Cross multiply
    20,505.82x = 28,297.94 × 11,431.06
  4. Step 4: Simplify right side
    20,505.82x = 323,475,322.12
  5. Step 5: Solve for x
    x = 323,475,322.12/20,505.82
  6. Step 6: Final answer
    x = 15,774.81

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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.