Home / 28,121.58-38,806.44-15,375.42

Finding the Fourth Proportional to 28,121.58, 38,806.44 and 15,375.42

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Solution

The fourth proportional to 28,121.58, 38,806.44 and 15,375.42 is: 21,217.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.58 : 38,806.44 = 15,375.42 : x
  2. Step 2: Convert to fraction form
    28,121.58/38,806.44 = 15,375.42/x
  3. Step 3: Cross multiply
    28,121.58x = 38,806.44 × 15,375.42
  4. Step 4: Simplify right side
    28,121.58x = 596,665,313.70
  5. Step 5: Solve for x
    x = 596,665,313.70/28,121.58
  6. Step 6: Final answer
    x = 21,217.35

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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.