Home / 20,079.15-30,120.77-6,928.44

Finding the Fourth Proportional to 20,079.15, 30,120.77 and 6,928.44

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Solution

The fourth proportional to 20,079.15, 30,120.77 and 6,928.44 is: 10,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.15 : 30,120.77 = 6,928.44 : x
  2. Step 2: Convert to fraction form
    20,079.15/30,120.77 = 6,928.44/x
  3. Step 3: Cross multiply
    20,079.15x = 30,120.77 × 6,928.44
  4. Step 4: Simplify right side
    20,079.15x = 208,689,947.70
  5. Step 5: Solve for x
    x = 208,689,947.70/20,079.15
  6. Step 6: Final answer
    x = 10,393.37

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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.