Home / 20,079.92-30,121.56-6,932.40

Finding the Fourth Proportional to 20,079.92, 30,121.56 and 6,932.40

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Solution

The fourth proportional to 20,079.92, 30,121.56 and 6,932.40 is: 10,399.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.92 : 30,121.56 = 6,932.40 : x
  2. Step 2: Convert to fraction form
    20,079.92/30,121.56 = 6,932.40/x
  3. Step 3: Cross multiply
    20,079.92x = 30,121.56 × 6,932.40
  4. Step 4: Simplify right side
    20,079.92x = 208,814,702.54
  5. Step 5: Solve for x
    x = 208,814,702.54/20,079.92
  6. Step 6: Final answer
    x = 10,399.18

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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.