Home / 20,969.76-28,928.73-12,467.06

Finding the Fourth Proportional to 20,969.76, 28,928.73 and 12,467.06

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Solution

The fourth proportional to 20,969.76, 28,928.73 and 12,467.06 is: 17,198.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.76 : 28,928.73 = 12,467.06 : x
  2. Step 2: Convert to fraction form
    20,969.76/28,928.73 = 12,467.06/x
  3. Step 3: Cross multiply
    20,969.76x = 28,928.73 × 12,467.06
  4. Step 4: Simplify right side
    20,969.76x = 360,656,172.73
  5. Step 5: Solve for x
    x = 360,656,172.73/20,969.76
  6. Step 6: Final answer
    x = 17,198.87

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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.