Home / 20,396.25-28,146.87-11,904.21

Finding the Fourth Proportional to 20,396.25, 28,146.87 and 11,904.21

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Solution

The fourth proportional to 20,396.25, 28,146.87 and 11,904.21 is: 16,427.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.25 : 28,146.87 = 11,904.21 : x
  2. Step 2: Convert to fraction form
    20,396.25/28,146.87 = 11,904.21/x
  3. Step 3: Cross multiply
    20,396.25x = 28,146.87 × 11,904.21
  4. Step 4: Simplify right side
    20,396.25x = 335,066,251.32
  5. Step 5: Solve for x
    x = 335,066,251.32/20,396.25
  6. Step 6: Final answer
    x = 16,427.84

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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.