Home / 20,399.25-28,150.88-11,901.72

Finding the Fourth Proportional to 20,399.25, 28,150.88 and 11,901.72

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Solution

The fourth proportional to 20,399.25, 28,150.88 and 11,901.72 is: 16,424.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.25 : 28,150.88 = 11,901.72 : x
  2. Step 2: Convert to fraction form
    20,399.25/28,150.88 = 11,901.72/x
  3. Step 3: Cross multiply
    20,399.25x = 28,150.88 × 11,901.72
  4. Step 4: Simplify right side
    20,399.25x = 335,043,832.01
  5. Step 5: Solve for x
    x = 335,043,832.01/20,399.25
  6. Step 6: Final answer
    x = 16,424.32

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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.