Home / 20,928.06-28,868.66-12,539.70

Finding the Fourth Proportional to 20,928.06, 28,868.66 and 12,539.70

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Solution

The fourth proportional to 20,928.06, 28,868.66 and 12,539.70 is: 17,297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.06 : 28,868.66 = 12,539.70 : x
  2. Step 2: Convert to fraction form
    20,928.06/28,868.66 = 12,539.70/x
  3. Step 3: Cross multiply
    20,928.06x = 28,868.66 × 12,539.70
  4. Step 4: Simplify right side
    20,928.06x = 362,004,335.80
  5. Step 5: Solve for x
    x = 362,004,335.80/20,928.06
  6. Step 6: Final answer
    x = 17,297.56

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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.