Home / 20,450.68-30,684.96-9,928.78

Finding the Fourth Proportional to 20,450.68, 30,684.96 and 9,928.78

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Solution

The fourth proportional to 20,450.68, 30,684.96 and 9,928.78 is: 14,897.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.68 : 30,684.96 = 9,928.78 : x
  2. Step 2: Convert to fraction form
    20,450.68/30,684.96 = 9,928.78/x
  3. Step 3: Cross multiply
    20,450.68x = 30,684.96 × 9,928.78
  4. Step 4: Simplify right side
    20,450.68x = 304,664,140.44
  5. Step 5: Solve for x
    x = 304,664,140.44/20,450.68
  6. Step 6: Final answer
    x = 14,897.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.