Home / 20,436.71-28,198.94-15,399.32

Finding the Fourth Proportional to 20,436.71, 28,198.94 and 15,399.32

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Solution

The fourth proportional to 20,436.71, 28,198.94 and 15,399.32 is: 21,248.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.71 : 28,198.94 = 15,399.32 : x
  2. Step 2: Convert to fraction form
    20,436.71/28,198.94 = 15,399.32/x
  3. Step 3: Cross multiply
    20,436.71x = 28,198.94 × 15,399.32
  4. Step 4: Simplify right side
    20,436.71x = 434,244,282.73
  5. Step 5: Solve for x
    x = 434,244,282.73/20,436.71
  6. Step 6: Final answer
    x = 21,248.25

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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.